_{1}

^{*}

The universe is vast and when we look at the sky, its parameters (dimensions, mass, and age) seems limitless. Lemaître proposed that the universe began from a primeval-atom [1] which was later ironically nicknamed by Hoyle “Big Bang” in a BBC broadcast in 1949 [2]. From general relativity, Einstein proposed a cosmological model [3] with a spatially finite universe. He assumed a uniform distribution of matter in a huge 4-D sphere. Even if his equations were showing that the universe was either contracting or expanding, Einstein introduced the “cosmological constant” in his equation to force the universe to be static (being consistent with the general way of thinking of his time). In 1929, from observations of galaxies, Hubble found that the universe was expanding. From that moment, Einstein discarded his cosmological constant as an unnecessary fudge factor. Many cosmological models have been built over time. Each of them excels in explaining some aspects of the universe. We consider that the global topology of the universe is not known, but making the assumptions that it is relatively homogenous and isotropic, its extrapolated local topology leads us to some global “apparent” parameters. From our new cosmological model, we calculate the main parameters of the universe which are its apparent mass* m _{u}*, its apparent curving radius

*R*, its apparent age

_{u}*T*and the “quantum of speed” ε

_{u}_{v}. The quantum of speed is a new notion in physics. It is the smallest speed increment that may exist. For metrology purposes, we calculate these parameters from the most precise physics’ parameters available.

Our universe has astronomic dimensions (mass, radius, and age) that borders limitless for humans. It is also expanding [

This article shows different ways to calculate the apparent mass m_{u} of the universe, the apparent radius R_{u} of curvature of the universe and the age of the universe. We want also to make conscious that these values are obtained from an observer at rest, at the center of mass of the universe. Nevertheless, if the observer is traveling on a photon, his point of view will be totally different. For this reason, we will show the notion of quantum of speed. With this notion, we will see that there is an infinitely small difference between the real speed of light and the speed limit that we call the speed of light in vacuum c. For most applications, the real speed of light and the speed limit are approximately the same.

We will then show different links between the infinitely large numbers of the universe and the infinitely small numbers of the universe thanks to Dirac’s hypothesis [

We will use the concise form of notation to display tolerances (2.736 (17) K will mean 2.736 ± 0.017 K). The following physics parameters are from CODATA 2014 [

· Speed of light in vacuum c ≈ 299792458 m ⋅ s − 1

· Electric constant in vacuum ε 0 ≈ 8.854187817 × 10 − 12 F ⋅ m − 1

· Magnetic constant in vacuum μ 0 ≈ 4π × 10 8 N ⋅ A − 2

· Planck constant h ≈ 6.626070040 ( 81 ) × 10 − 34 J ⋅ s

· Planck length L p ≈ 1.616229 ( 38 ) × 10 − 35 m

· Planck time t p ≈ 5.39116 ( 13 ) × 10 − 44 s

· Planck mass m p ≈ 2.176470 ( 51 ) × 10 − 8 kg

· Universal gravitational constant G ≈ 6.67408 ( 31 ) × 10 − 11 m 3 ⋅ kg − 1 ⋅ s − 2

· Electron charge q e ≈ − 1.6021766208 ( 98 ) × 10 − 19 C

· Electron mass m e ≈ 9.10938356 ( 11 ) × 10 − 31 kg

· Classical electron radius r e ≈ 2.8179403227 ( 19 ) × 10 − 15 m

· Rydberg constant R ∞ ≈ 10973731.568508 ( 65 ) m − 1

Let us enumerate different ways to calculate the apparent mass of the universe m_{u}. This mass includes every type of mass (baryonic and dark mass) and the mass associated with all types of energy (photons, dark energy, etc.).

We prefer to talk about the “apparent mass of the universe” instead of talking about the “mass of the universe” because its apparent value is seen from our point of view in the universe. For an observer located somewhere else, the observed value may be different. Please refer to our section talking about the quantum of speed to deepen your notion of “appearance” for the different parameters of the universe.

Let us use the principle of conservation of momentum applied to the universe which says that a force F applied during a time Δt will move a mass m_{u} (the apparent mass of the universe) by increasing its speed by Δv. The luminous universe is expanding at the speed of light in vacuum c. Therefore, we can consider that in Equation (1), Δv = c.

F Δ t = m u Δ v → F = m u Δ v Δ t → F = m u c Δ t (1)

Let us suppose that the universe is expanding for a time Δt equal to the apparent age of the universe T_{u}. This value is given by the inverse of the Hubble constant which is about H 0 ≈ 72.1 km ⋅ s − 1 ⋅ MParsec − 1 [^{22} m.

Δ t = T u = 1 H 0 ≈ 13.65 × 10 9 years (2)

If we look at the universe as a whole, and if we use Newton’s universal attraction equation to calculate the force F that the universe of apparent radius R_{u} applies on its own mass m_{u}, we get Equation (3). The constant G is the universal gravitational constant.

F = G m u 2 R u 2 (3)

In Equation (3), the value of R_{u} is the apparent radius of curvature of the universe.

R u = c T u = c H 0 ≈ 1.28 × 10 26 m (4)

Let us equate the forces F from Equation (1) and (3). Once we simplify and use Equation (2) and Equation (4), we get Equation (5).

m u = c 3 G H 0 ≈ 1.73 × 10 53 kg (5)

We get an equation which is the same as Carvalho [

Let us use the principle of conservation of Energy to find the apparent mass m_{u} of the universe. Initially, at the Big Bang, there was no movement yet. All the energy contained in the universe was contained in the mass m_{u} of the universe. The total amount of energy E contained in the universe is given by Einstein formula.

E = m u c 2 (6)

Since the universe is expanding, the initial energy is converted to potential energy through a gravitational force F applied on a distance R_{u} (see Equation (4)) from the center of mass of the universe. Let us use Newton’s law.

F = G m 2 R u 2 → E = F R u = G m 2 R u (7)

By equating Equation (6) and Equation (7), and using Equation (4), we get Equation (8).

m u c 2 = G m u 2 R u where R u = c H 0 (8)

Isolating the apparent mass of the universe m_{u} from Equation (8), we get Equation (9).

m u = c 2 R u G = c 3 G H 0 ≈ 1.73 × 10 53 kg (9)

One will notice that this is the same equation as Equation (5).

Let us calculate the apparent mass of the universe m_{u} by using the Planck mass m_{p}. By definition, the Plank mass is defined by Equation (10) where h is the Planck constant, c is the speed of light, and G is the universal gravitational constant.

m p = h c 3 2 π G ≈ 2.18 × 10 − 8 kg (10)

Let us define m_{ph} as being the mass associated with the lowest energy photon in the universe [_{ph} to a photon of wavelength λ = 2πR_{u} where R_{u} is the apparent radius of the universe.

m p h = h c λ c 2 = h c 2 π R u c 2 = h H 0 2 π c 2 ≈ 2.74 × 10 − 69 kg (11)

The Plank mass m_{p} is the geometric average between the smallest mass m_{ph} associated with the lowest energy photon and the biggest mass which is without any doubt the apparent mass of the universe m_{u}. From this fact, we get the following Equation.

m p = m p h m u ≈ 2.17 × 10 − 8 kg (12)

Equating Equations (12) and (10), and using Equation (11), we get m_{u}..

m u = c 3 G H 0 ≈ 1.73 × 10 53 kg (13)

Again, we get, without any surprise, the same equation as Equation (5).

We will calculate the apparent mass m_{u} of the universe by equating the gravitational energy of a photon with the mass-energy contained in a photon (being a corpuscle) [_{ph} (like in Equation (11)) with a photon of the lowest energy [_{u}). Then, if we place this photon at the periphery of the luminous universe, it will have an E_{g} gravitational energy.

E g = G m u m p h R u (14)

According to the special relativity, the mass-energy associated with this photon is E_{m}.

E m = m p h c 2 (15)

By equating Equations (14) and (15), replacing R_{u} with Equation (4), and isolating m_{u}, we get the same equation as Equation (5).

m u = c 3 G H 0 ≈ 1.73 × 10 53 kg (16)

Recently, with a new cosmological model, the precise values of the universal gravitational constant G and of the Hubble constant H_{0} have been found [_{e}, the mass of the electron m_{e}, the fine-structure constant α, and β (see Equation (19)). Let us use Equations (17) and (18) to evaluate precisely m_{u} (for metrology purposes).

G = c 2 r e α 20 m e β ≈ 6.673229809 ( 86 ) × 10 − 11 m 3 ⋅ kg − 1 ⋅ s − 2 (17)

H 0 = c α 19 β r e ≈ 72.09548580 ( 32 ) km ⋅ s − 1 ⋅ MParsec − 1 (18)

In these two equations, β is defined as the ratio between the expansion speed of the material universe and the expansion speed of the luminous universe. According to our model, the material universe is embedded in a luminous universe, both being spherical and expanding with a speed proportional to their radius [

β = 3 − 5 ≈ 0.76 (19)

with his special relativity theory, Einstein showed that if we accelerate any mass at rest m_{0} to a speed v, its energy E would increase because of the Lorentz factor (the square root in Equation (20)) [

E = m c 2 = m 0 c 2 1 − v 2 c 2 ≈ m 0 c 2 + 1 2 m 0 v 2 + 3 8 m 0 v 4 c 2 + ⋯ with v < c (20)

With Equation (17) and Equation (18), we modify Equation (5) to get Equation (21).

m u = m e β α 39 = 1.728098528 ( 26 ) × 10 53 kg (21)

This equation is one of the most precise of all since it relies on very well-known constants defined in the CODATA 2014 [

The electron charge q_{e} may be described as a function of the electron mass m_{e}, the electron radius r_{e} and the relative permeability of vacuum ε_{0} [

q e = − 4 π r e m e μ 0 ≈ − 1.60 × 10 − 19 C (22)

If we isolate the electron mass m_{e} from Equation (22) and if we put its value in Equation (21), we get an equation that gives the apparent mass of the universe as a function of the electron charge q_{e}. Its precision is equivalent to Equation (21).

m u = μ 0 q e 2 β 4 π r e α 39 = 1.728098528 ( 26 ) × 10 53 kg (23)

Let us use the definition of the Rydberg constant R_{¥} as a function of the fine-structure constant α and the classical electron radius r_{e} to find the apparent mass of the universe.

R ∞ = α 3 4 π r e ≈ 1.10 × 10 7 m − 1 (24)

If we replace the classical electron radius r_{e} from Equation (23) with Equation (24), we get Equation (25) that gives the apparent mass of the universe m_{u} as a function of the Rydberg R_{¥} constant and the electron charge q_{e}.

m u = μ 0 q e 2 R ∞ β α 42 = 1.728098528 ( 27 ) × 10 53 kg (25)

Let us enumerate different ways to calculate the apparent radius of curvature of the universe R_{u}.

We use the term “apparent” because the radius value is seen from our point of view in the universe. For an observer located somewhere else, the observed value may be different. Please refer to our section talking about the “quantum of speed” (further in this article) to deepen our notion of “appearance” for the different parameters of the universe. Also, we prefer to use the term “apparent radius of curvature of the universe” instead of talking about the “radius of curvature” of the universe as mentioned by Einstein [

Let us note that even if we get the same resulting distance as the Hubble radius [^{−9} % of the total radius R_{u}.

The classical way to calculate the apparent radius of curvature of the universe R_{u} consist in saying that the speed of light in vacuum c was constant and traveled a time-lapse equal to an age of the universe T_{u} which is a function of H_{0} (see Equation (2)).

R u = c T u = c H 0 ≈ 1.28 × 10 26 m (26)

According to different sources, H_{0} is between 67.8(9) km×s^{−1}×MParsec^{−1} [^{−1}×MParsec^{−1} [_{0} rely on inaccurate methods such as the observation of stars. Uncertainties from different measurement results do not always overlap. For better accuracy, we will use H_{0} from our Equation (18). It is compatible with Salvatelli, with H 0 ≈ 72.1 − 2.3 + 3.2 km ⋅ s − 1 ⋅ MParsec − 1 [

Let us use Equation (18) in Equation (26) to evaluate precisely (for metrology purposes) the apparent radius of curvature of the universe R_{u}.

R u = r e α 19 β ≈ 1.2831078845 ( 57 ) × 10 26 m (27)

Let us define the apparent radius of curvature R_{u} as a function of the Rydberg constant R_{¥}. Let us isolate r_{e} from Equation (22) and use it in Equation (27). We get Equation (28) which gives the apparent radius of curvature of the universe R_{u} as a function of the electron charge q_{e} and of the electron mass m_{e}.

R u = q e 2 μ 0 4 π m e α 19 β ≈ 1.283107889 ( 13 ) × 10 26 m (28)

Like Equation (28) which uses well-known parameters from CODATA and β constant which can be calculated very accurately, we want to define the apparent radius of curvature R_{u} as a function of the Rydberg constant R_{¥}. Let us rewrite Equation (27) with Equation (24) to get the most precise way, up to now, to calculate the apparent radius of the universe R_{u}.

R u = 1 4 π R ∞ α 16 β ≈ 1.2831078902 ( 48 ) × 10 26 m (29)

NASA currently estimates the age of the universe by using the inverse of the Hubble constant [_{0}. The metric based on the work made by the physicists Friedmann [_{0}) [

Einstein was considering the universe as being static [

In 1929, Hubble found that the universe was expanding [

With special relativity, Einstein showed that a gravitational field generated by a mass slows down light [^{ }The universe is expanding [

Initially, we will show how the approximate age of the universe is calculated. In a second step, we will use some results from a work we have done recently [_{0} actually represents a good approximation of the apparent age T_{u} of the universe and that 2/(3H_{0}) represents the real part of the age of the universe. We can then compare the results and comment.

In 1929, Edwin Powell Hubble found that galaxies distance themselves from one another at a speed proportional to the distance between them [_{0}. It represents the average recession speed v of galaxies per unit of distance Δr. Let us note that galaxies have their own freedom of movements. Some may move closer to each other and some will move away from each other. But overall, they will move away from each other because of the inflating movement of the universe.

v Δ r = 1 Δ t = H 0 = 72.1 km ⋅ MParsec − 1 ⋅ s − 1 (30)

As seen in Equation (18), H 0 ≈ 72.1 km ⋅ MParsec − 1 ⋅ s − 1 . Let us isolate Δt.

Δ t = 1 H 0 ≈ 13.65 × 10 9 years (31)

NASA is currently evaluating the age of the universe with Equation (31) [

According to the model of Friedmann-Robertson-Walker [

Δ t = 2 3 ⋅ H 0 ≈ 9.04 × 10 9 years (32)

The speed of the light in vacuum and the expansion speed of the material universe may have not been constant over time [_{m}(r) of the material universe.

We will use some results of the work cited in [_{m}(r) of expansion of the material universe as a function of the radius of curvature of the universe. In this way, we will calculate the age of the universe Δt_{u}.

As mentioned before, the general theory of relativity predicts that the presence of a massive body changes near space-time and increases the index of refraction n(r) (which changes as a function of the distance r from the center of mass of the massive body) of the vacuum around a mass [

We apply the same principle to the universe which is certainly the biggest existing mass. Since the universe is expanding [

k = c 2 + 5 ≈ 2 c ≈ 6.17 × 10 8 m ⋅ s − 1 (33)

As soon as we try to calculate the speed of light for the time in the past or in the future, we must take into account that the speed of light v_{L}(r) changes as a function of the apparent radius of curvature r of the universe [

v L ( r ) = k n ( r ) where n ( r ) = 1 − 2 Θ / k 2 1 + 2 Θ / k 2 and Θ = − G m u r ≤ 0 (34)

In this equation, there is a radius of curvature r = r_{h} for which the speed of light v_{L}(r_{h}) = 0. This position r_{h} is called the horizon of the universe. This is the position for which the denominator of the square root of Equation (34) becomes zero. In a similar way, in a black hole, the radius of curvature of the horizon r_{h} is obtained by the Schwarzschild’s radius where we replace c by k:

r h = 2 G m u k 2 ≈ 6.06 × 10 25 m (35)

It is the same principle as that of a black hole. In fact, the universe is the biggest existing black hole since it has the biggest mass.

Let us note that for a conventional black hole, its entire mass is located in its center of mass. However, for the universe, a big part of the black hole mass lays outside the boundaries of the horizon. The center of mass of the universe coincides with the center of mass of the black hole.

The expansion speed of the universe is currently the speed of light c [_{u} of the material universe is, therefore, a portion β of the apparent radius of curvature R_{u} of the luminous universe [

r u = β R u ≈ 9.80 × 10 25 m (36)

The expansion speed v_{m}(r) of the material universe is β times the speed of light v_{L}(r) because matter must travel slower than light [

v m ( r ) = β v L ( r ) = β k n ( r ) where n ( r ) = 1 − 2 Θ / k 2 1 + 2 Θ / k 2 and Θ = − G m u r ≤ 0 (37)

If we take the derivative of the expansion speed v_{m}(r) of the material universe with respect to the distance r, we get the Hubble constant H_{0} [

d v m ( r ) d r | r = r u = k β y r u ( 1 ( 1 + y ) 1 − y 2 ) = H 0 where y = 2 G m u k 2 r u (38)

It is important to realize that we do not use the derivative of the expansion speed of the luminous universe to get H_{0} since astronomers cannot observe that limit. Through their telescopes, they only see objects like stars and galaxies. Consequently, when Hubble defined its constant H_{0}, it was based on the derivative of the expansion speed v_{m}(r) of the material universe.

At the periphery of the luminous universe (at a distance r = R_{u} from the center of mass of the universe), light accelerates at an a_{L}(R_{u}) = cH_{0} rhythm.

a L ( R u ) = d v L ( r ) d t | r = R u = ( d r d t ⋅ d v L d r ) | r = R u = c ( d v L d r ) | r = R u = c H 0 (39)

However, locally, at a distance r = r_{u} from the center of mass of the universe, light slowly accelerates at an a_{L}(r_{u}) = cH_{0}/β rhythm.

a L ( r u ) = d v L ( r ) d t | r = r u = ( d r d t ⋅ d v L d r ) | r = r u = c ( d v L d r ) | r = r u = c H 0 β (40)

Locally, at a distance r = r_{u} from the center of mass of the universe, matter from the material universe slowly accelerates at an a_{m}(r_{u}) = cH_{0} rhythm.

a m ( r u ) = β d v L ( r ) d t | r = r u = β ( d r d t ⋅ d v L d r ) | r = r u = β c ( d v L d r ) | r = r u = β c H 0 β = c H 0 (41)

_{m}(r) of the material universe calculated from Equation (37). It also puts in evidence the Hubble constant H_{0} as the slope evaluated precisely at the position r = r_{u} from the center of mass of the universe (at r = 0). Between r = 0 (at the Big Bang) and r = r_{h} (horizon of the universe), the dotted part of the curve shows that the expansion speed of the material universe would normally be negative and of imaginary type. Then, from r = r_{h} and infinite, the expansion speed of the material universe becomes of real type.

The negative and imaginary value of the speed v_{m}(r) we get with r < r_{h} is a mathematical way to show that in a physical world, matter inside the horizon evolves independently than outside the horizon. Here, we cannot see what is happening inside the horizon and vice versa. We could compare it to the cylindrical envelope of an optical fiber. Light can travel inside a fiber from one extremity to the other end, but we cannot see through the envelope (if the fiber is used in its curving limits). It is therefore impossible to know what is happening from outside the fiber and vice versa. Of course, the principles in cause in fiber are not the same. We only bring this example to do an image of the situation happening inside the horizon of a black hole.

Performing the integral of the inverse of v_{m}(r) with respect to the radius of curvature r, it is possible to calculate precisely the age of the universe more precisely (in its entirety with the real part and its imaginary part) than by using a single tangential projection. In _{0} which can be put in Equation (31) to give the apparent age of the universe.

Let’s find the age of the universe Δt_{u}(r) by performing the integral of Equation (42) between the center of mass of the universe (at r = 0) and the apparent radius of curvature of the material universe r_{u}. The resulting value Δt_{u}(r) is of a complex type.

Δ t u ( t ) = ∫ 0 r u 1 v m ( r ) d r = Δ t h u ( r ) + Δ t 0 h ( r ) (42)

In Equation (42), the value of Δt_{hu}(r) represents the time elapsed between the horizon and the actual age of the universe (see Equation (43)). The resulting value is of real type.

Δ t h u ( r ) = ∫ r h r u 1 v m ( r ) d r (43)

In Equation (42), the value of Δt_{0h}(r) represents the time elapsed between the Big Bang and the horizon (see Equation (44)). The resulting value is of an imaginary type.

Δ t 0 h ( r ) = ∫ 0 r h 1 v m ( r ) d r (44)

Performing the integral calculation of Equation (42), we get Equation (45).

∫ 1 v m ( r ) d r = ( z ( r ) + 2 G ⋅ m u ln ( 2 [ k 2 r + z ( r ) ] ) ) β k 3 where z ( r ) = k 4 r 2 − 4 G 2 m u 2 (45)

Consequently, the value of Δt_{u}(r) becomes:

Δ t u ( r ) = Δ t h u ( r ) + Δ t 0 h ( r ) ≈ ( 9.50 + 10.47 i ) × 10 9 yearswhere i = − 1 (46)

This result is of a complex type. In Equation (46), the first part of the integral (shown in Equation (43)) is of a real type (between r_{h} and r_{u}). However, the second part of this latter one (shown in Equation (44)) is of an imaginary type (between 0 and r_{h}).

If we look carefully to Equation (37), for a radius smaller than the horizon r_{h}, the speed of light v_{L}(r_{h}) becomes of an imaginary type. For this reason, the time T_{0h} become of an imaginary type as well. This mathematical situation just means that time inside the horizon evolves in a completely independent way compared to time outside the horizon, which is why no one can see what happens inside the limits of the horizon of a black hole. The best example we could give is within a fiber optic cable. How light evolves inside the fiber cannot be seen from outside the fiber, and vice versa. Mathematics are a nice language which has to be interpreted to find sense in the real world.

When we wish to consider the time elapsed between position 0 of the Big Bang and the radius of curvature of the horizon r_{h}, we must calculate the module of the time elapsed çΔt_{u}ç. We define this value as the apparent age T_{u} of the universe because it does not necessarily represent the true age of the universe. This number represents only an apparent age in the likely event that the Big Bang existed. It could also be seen as the time that elapsed if the speed of light had been constant over time since the Big Bang.

T u = | Δ t u | = | Δ h u + Δ t 0 h | = Δ t h u 2 + Δ t 0 h 2 ≈ 14.14 × 10 9 years (47)

We see that the value is only 4.25% over the value of Equation (31).

As for the calculation of power in electrical motors (with the real power, the inductive power and the apparent power), the age of the universe may be seen as follows: the “real” part of the age of the universe, the “imaginary” part of the age of the universe and the “apparent” age of the universe. The module of the two components (real and imaginary) can be calculated using the Pythagorean Theorem by finding the square root of the sum of the squares of the real part and the imaginary part of the age of the universe.

The approximation of the age of the universe will be made in 3 parts: the approximation of the real part of the age of the universe, the approximation of the imaginary part of the age of the universe and the calculation of the module of the apparent age of the universe. In

Let’s perform the approximation of the real part Δt_{hu} of the age of the universe Δt_{u}.

For a radius of curvature r_{h} of the horizon, the square root in Equation (48) equals zero.

z ( r h ) = k 4 r h 2 − 4 G 2 m u 2 = 0 (48)

So, according to Equation (42) and Equation (45), we get Equation (49).

Δ t h u = z ( r u ) + 2 ⋅ G ⋅ m u ⋅ ln ( 2 ⋅ [ k 2 ⋅ r u + z ( r u ) ] ) β ⋅ k 3 − 2 ⋅ G ⋅ m u ⋅ ln ( 2 ⋅ k 2 ⋅ r h ) β ⋅ k 3 where z ( r u ) = k 4 ⋅ r u 2 − 4 ⋅ G 2 ⋅ m u 2 (49)

Using Equation (35) with a few simplifications, we get Equation (50).

Δ t h u = 1 β ⋅ k ( r u 2 − r h 2 + r h ln ( r u 2 − r h 2 + r u r h ) ) (50)

Without changing anything, this same equation could be rewritten as follows.

Δ t h u = r u 2 ⋅ β ⋅ c ⋅ ( 1 + β 2 ) ⋅ y ≈ r u 2 ⋅ β ⋅ c ⋅ ( 1 + β 2 ) where y = [ 2 ⋅ c k ⋅ r u ⋅ ( 1 + β 2 ) ⋅ ( r u 2 − r h 2 + r h ln ( r u 2 − r h 2 + r u r h ) ) ] ≈ 1 (51)

As shown, the content of the bracket is approximately equal to 1. By doing this approximation and using Equation (36), Equation (51) becomes Equation (52).

Δ t h u ≈ 1 4 H 0 ( 2 + β ) (52)

Further, in this document, we will use Equation (52) to perform the calculation of the apparent age of the universe. For now, let us show that this equation can be approximated to get an equation commonly used by some astronomers to calculate the actual age of the universe.

According to Equation (19), the value of β ≈ 0.76. Let’s use this approximation to rewrite Equation (52). After a few simplifications, we get:

Δ t h u ≈ 1 4 H 0 ( 2 + 76 100 ) ≈ 1 H 0 ( 69 100 ) ≈ 2 3 H 0 ≈ 9.04 × 10 9 years (53)

This last ratio can be deduced from the model of Friedmann-Robertson-Walker [

Now, let’s find the approximate value of the imaginary part T_{0h} of the age of the universe T_{u}. From Equation (42), Equation (45) and Equation (48) we get:

Δ t 0 h = [ 2 ⋅ G ⋅ m u ⋅ ln ( 2 ⋅ k 2 ⋅ r u ) β ⋅ k 3 ] − [ − 4 ⋅ G 2 ⋅ m u 2 + 2 ⋅ G ⋅ m u ⋅ ln ( 2 ⋅ − 4 ⋅ G 2 ⋅ m u 2 ) β ⋅ k 3 ] (54)

Using Equation (35) and performing a few simplifications, we get Equation (55).

Δ t 0 h = r h β ⋅ k ⋅ [ ln ( − i ) − i ] where i = − 1 (55)

Using the relationship in Equation (56), we rewrite Equation (55), which is the result of a purely imaginary type, to get Equation (57).

ln ( − i ) = − π 2 ⋅ i (56)

Δ t 0 h = − r h β ⋅ k ⋅ [ 1 + π 2 ] ⋅ i (57)

We can rewrite Equation (57) in the following way without changing anything:

Δ t 0 h = − r u 2 ⋅ β ⋅ c ⋅ ( 1 − β 2 ) ⋅ ( 1 + π 2 ) ⋅ x ⋅ i where x = [ 2 ⋅ c k ⋅ r h r u ⋅ ( 1 − β 2 ) ] ≈ 1 (58)

As shown, the value of x is approximately 1. Equation (58) then becomes:

Δ t 0 h ≈ − 1 2 ⋅ H 0 ⋅ ( 1 − β 2 ) ⋅ ( 1 + π 2 ) ⋅ i (59)

Let’s calculate the apparent age of the universe by using Equation (47) with Equation (52) and Equation (59). After a few simplifications, we get Equation (60).

| Δ t u | = | Δ t h u + Δ t 0 h | = Δ t h u 2 + Δ t 0 h 2 ≈ 1 H 0 χ ≈ 1 H 0 where χ = ( 1 2 ⋅ ( 1 + β 2 ) 2 + ( ( 1 − β 2 ) ⋅ ( 1 + π 2 ) ) 2 ) ≈ 1 (60)

The value of χ is approximately equal to 1. Consequently, we have shown that the integral of Equation (42) can be approximated by Equation (31). According to us, based on the approximation calculation made at Equation (60), Equation (31) represents only an apparent age T_{u} of the universe. In fact, it comes from the calculation of the module of a complex sum of the real part and the imaginary part of the age of the universe. We define T_{u} as the apparent age of the universe.

T u = | Δ t u | ≈ 1 H 0 ≈ 13.65 × 10 9 years (61)

By definition, a quantum (the word “quanta” is plural) represents the smallest indivisible amount of any physical entity. For example, Planck length L_{p} represents a quantum of distance and Planck time t_{p} represents a quantum of time. The quantum of speed is the smallest variation of speed that can be obtained. It is so small that it is immeasurable. Nevertheless, it is possible to calculate it thanks to certain physical considerations.

We want to show, among other things, that the different parameters (apparent mass, radius, and age) of the universe are what they are from our point of view. However, they may look different from the point of view of an observer traveling at the speed of light. Thus, everyone will understand why we consider these parameters as being “apparent”.

In relativity, the speed of light in vacuum c is considered the speed limit. It is used in the Lorentz factor. We will show that even light does not exactly travel at the speed limit c, but a bit less. In fact, the real speed of light is c-ε_{v} where ε_{v} is what we call the quantum of speed. This is the smallest variation of speed that can be measured.

Let us suppose an observer at rest looking at a mass m_{0}. According to special relativity [

m ′ = m 0 1 − v 2 c 2 (62)

We would be tempted to say that when v ® c, the mass m′ tends towards infinity. However, this is not logical since it is impossible to reach a mass bigger than the mass of the universe m_{u}. We cannot give to a mass more energy than what is available in the whole universe. This statement imposes a new limit to the speed v.

We make the statement that Planck mass m_{p} represents the highest level of energy for a particle. It is easy to verify this assertion by equating the energy of an arbitrary mass m with the energy of the smallest wavelength λ possible (which is 2πL_{p}, where L_{p} is the Planck length). Planck length L_{p} is considered, in a quantum world, the smallest unit of length. This is due to the Heisenberg’s uncertainty principle which says that we cannot measure precisely the speed of an object and its precise location at the same time [^{2}) is associated to the wave energy (given by Planck’s formula E = hc/λ [

m c 2 = h c λ where λ = 2 π L p (63)

The standard definition of a Planck length is Equation (64), which implies the universal gravitational constant G, the Planck constant h and the speed of light in vacuum c.

L p = h G 2 π c 3 ≈ 1 .62 × 10 − 35 m (64)

If we replace L_{p} in Equation (63) and if we isolate the mass m, we get Equation (65) which is exactly the standard definition of Planck mass m_{p}.

m = h c 2 π G = m p ≈ 2.18 × 10 − 8 kg (65)

From this statement, we can calculate the maximum speed v_{m} at which we might move a particle having an initial mass m_{ph} at rest. We give to this mass the same value as the mass associated to a photon of wavelength λ = 2πR_{u} (the apparent circumference of the universe). Since this wavelength is the longest that we can reach in the universe, it corresponds to the lowest amount of energy we can get.

m p h 1 − v m 2 c 2 = m p → v m = c 1 − m p h 2 m p 2 (66)

Since m p h ≪ m p , we can make the following approximation.

v m ≈ c ( 1 − m p h 2 2 m p 2 ) (67)

In Equation (67), m_{ph} is defined by Equation (11).

Dirac made the hypothesis that all large, dimensionless numbers that could be constructed from the important natural units of cosmology and atomic theory were connected. Let us call N the ratio between the apparent mass of the universe m_{u} and the mass m_{ph} of associated with the photons of the lowest energy (from Equation (11)).

N = m u m p h ≈ 6.30 × 10 121 (68)

Let us show that Equation (67) can be defined as a function of N. Let us rewrite Equation (68) with Equation (5) and Equation (11). Then, using the Planck mass m_{p} (given by Equation (10)), we show that N can be redefined as a function of m_{p} and m_{ph} (instead of m_{u} and m_{ph}).

N = c 3 G H 0 ⋅ 2 π R u c h = h c 2 π G ⋅ 4 π 2 R u 2 c 4 h 2 c 2 = m p 2 m p h 2 ≈ 6.30 × 10 121 (69)

Let’s define the speed v_{m} in Equation (67) as a function of N with Equation (69).

v m ≈ c − c 2 N (70)

If we replace v_{m} by c-ε_{v}, the value of ε_{v} could be defined as the “quantum of speed”.

ε v ≈ c 2 N ≈ 2.38 × 10 − 114 m ⋅ s − 1 (71)

This speed variation ε_{v} is the smallest speed unit possible. For an academic purpose, let us rewrite Equation (62) by replacing the speed v per c-nε_{v}, where n is an integer >0.

m ′ = m 0 1 − v 2 c 2 where v = c − n ε v and n = 1 , 2 , 3 , ⋯ , 2 N (72)

We see that with Equation (72), we cannot reach an infinite mass anymore and that the real speed of light is at least a quantum of speed slower than the speed limit c. Everyone will admit that ε_{v} is a so small value compared to any speed value that it may be neglected most of the time. Nevertheless, it allows putting in evidence some speed boundaries.

The universe is expanding with relativistic speeds. For an observer traveling at the speed of light (c-ε_{v}), the total mass of the universe would be much smaller. In fact, it would be seen as being only the Planck mass m_{p} ≈ 2.18 ´ 10^{−8} kg. If we travel at the same speed as a photon, we have to null out the Lorentz factor that is included at the denominator in the apparent mass of the universe m_{u} to see what is happening from the observer point of view. We multiply m_{u} by the Lorentz factor using Equations (70) and (71).

m u 1 − ( c − ε v ) 2 c 2 ≈ m u 1 N ≈ m p ≈ 2.18 × 10 − 8 kg (73)

Planck mass m_{p} is usually defined by Equation (65).

Similarly, for an observer traveling at the speed of light (c-ε_{v}), the apparent radius of curvature R_{u} would look like being only the Planck length L_{p} ≈ 1.6 ´ 10^{−35} m.

R u 1 − ( c − ε v ) 2 c 2 ≈ R u 1 N ≈ L p ≈ 1.62 × 10 − 35 m (74)

Planck length L_{p} is usually defined by Equation (64).

Again, for an observer traveling at the speed of light (c-ε_{v}), the apparent age of the universe T_{u} would look like being only the Planck time t_{p}.

T u 1 − ( c − ε v ) 2 c 2 ≈ 1 H 0 1 − ( c − ε v ) 2 c 2 ≈ 1 H 0 1 N ≈ t p ≈ 5.39 × 10 − 44 s (75)

Planck time t_{p} is usually defined by Equation (76).

t p = h G 2 π c 5 = L p c ≈ 5.39 × 10 − 44 s (76)

On another side, for an observer at rest, if there were no expansion, no movement, and no rotation in the universe, the total mass of the universe would be only the Planck mass m_{p}. Most of the universe energy (therefore its mass) is coming from different sort of relativistic movement. The demonstration becomes the same as in Equation (73). Obviously, if there were no expansion, the apparent radius of the universe would be the Planck length L_{p}. If there were no expansion in the universe, the apparent age of the universe would be the Planck time t_{p}.

Dirac made the hypothesis that all large, dimensionless numbers that could be constructed from the important natural units of cosmology and atomic theory were connected [_{u} (apparent mass of the universe), m_{p} (Planck mass), R_{u} (apparent radius of the universe), L_{p} (Planck Length), T_{u} (apparent age of the universe), t_{p} (Planck time) and H_{0} (Hubble constant).

N = m u m p h = m u 2 m p 2 = m p 2 m p h 2 = m u R u m p L p = m p R u m p h L p = m u T u m p t p = 6.3 × 10 121 (77)

N = m p T u m p h t p = m u m p t p H 0 = m p m p h t p H 0 = R u 2 L p 2 = T u 2 t p 2 = 1 t p 2 H 0 2 ≈ 6.3 × 10 121 (78)

Let us remind that N represents the maximum number of photons of the lowest energy that may exist in the universe (if we were converting the entire mass of the universe in photons having a wavelength equal to the apparent circumference of the universe 2πR_{u}).

In Equation (77) and Equation (78), the values of the different parameters of the universe may be obtained from imprecise sources. A precise link between the large number N [

N = 1 α 57 ≈ 6.303419702 ( 84 ) × 10 121 (79)

By showing Equations (77)-(79), our goal was to highlight the fact that there are tight and precise links between the infinitely large and infinitely small. Once we are aware of these interesting links, we can find more similar precise links with the large number N. More than a hundred other equations may be made about this large number N and various parameters of the universe (temperature, charge, etc.) [

In this article, we have shown different ways to calculate the apparent mass of the universe, the apparent radius of curvature of the universe and the age of the universe. We also made the calculation of the quantum of speed. With these parameters, we used Dirac’s large numbers hypothesis to show that there are links between all these parameters.

We have defined a new concept that we think must be introduced in physics: the “quantum of speed” ε_{v}. The “quantum of speed” notion made us conscious that there is a little difference between the real speed of light and the speed limit. For most application, it does not matter to say that both speeds are equal. Although, in some special case, it is necessary to put in evidence the difference. Using common sense, we show that it is evident that we cannot give more energy to any mass than there is energy in the whole universe (which is m_{u}). Also, since Planck mass m_{p} is associated to the highest level of energy for an accelerated particle, we cannot give more energy to any particle than what is contained in the Planck mass m_{p}. Following these two findings, the “quantum of speed” ε_{v} is naturally introduced.

It was a necessity to introduce the “quantum of speed” to be able to calculate what would be the apparent mass of the universe, the apparent radius of curvature and the age of the universe from the point of view of an observer traveling at the speed of light. Surprisingly, the results are totally different than what common sense would lead to. Only relativity allows us to interpret correctly the results according to the point of view of the observer.

From a metrology point of view, we reach our goal by obtaining precise values for different dimensions of the universe. Using these values will make it easier to see the different links we can make between large numbers of Dirac and the infinitely small. With imprecise values, we can pass beside nice occasions to make rise new theories.

The author declares no conflicts of interest regarding the publication of this paper.

Mercier, C. (2019) Calculation of the Mass of the Universe, the Radius of the Universe, the Age of the Universe and the Quantum of Speed. Journal of Modern Physics, 10, 980-1001. https://doi.org/10.4236/jmp.2019.108065