The proper distance—the distance as would be measured at a specific time, including the present—between Earth and the edge of the observable universe is 46 billion light-years(14 billion parsecs), making the diameter of the observable universe about 93 billion light-years (28 billion parsecs).
The spatial region that can be observed with telescopes is called the observable universe, which depends on the location of the observer.
For example, radio messages sent from Earth may never reach some regions of space, even if the universe were to exist forever: space may expand faster than light can traverse it.
According to the general theory of relativity, far regions of space may never interact with ours even in the lifetime of the universe due to the finite speed of light and the ongoing expansion of space.
These laws are Gauss's law and the non-divergence of the stress–energy–momentum pseudotensor.
The universe also appears to have neither net momentum nor angular momentum, which absences follow from accepted physical laws if the universe is finite.
since matter and antimatter, if equally produced at the Big Bang, would have completely annihilated each other and left only photons as a result of their interaction.
This imbalance between matter and antimatter is partially responsible for the existence of all matter existing today,
The universe appears to have much more matter than antimatter, an asymmetry possibly related to the CP violation.
