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Robert J. Grave
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Can galaxies move faster than light, the speed limit, do to expansion of the universe?
Robert J. Grave said:...
I personally would need strong evidence to accept the universe came about from nothing.
The speed of light is a fundamental constant in physics and is denoted by the symbol c. In a vacuum, it has a value of approximately 299,792,458 meters per second (m/s). This means that light can travel around the Earth more than seven times in one second!
The speed of light is important in understanding the expansion of the universe because it is the fastest possible speed at which any information or energy can travel. This means that the expansion of the universe is also limited by the speed of light, and objects that are farther away from us are moving away at faster speeds due to the expansion of the universe.
The speed of light and the expansion of the universe are closely related through the theory of relativity. According to this theory, the speed of light is constant, and the expansion of the universe is accelerating. This means that as the universe expands, objects are moving away from each other at faster speeds, but the speed of light remains constant.
According to our current understanding of physics, nothing can travel faster than the speed of light. This is because as an object approaches the speed of light, its mass increases and it requires an infinite amount of energy to reach the speed of light. Therefore, the speed of light is considered to be the universal speed limit.
Scientists use various methods to measure the expansion of the universe, including observing the redshift of distant galaxies, studying the cosmic microwave background radiation, and measuring the brightness and distance of Type Ia supernovae. These methods provide evidence that the universe is expanding at an accelerated rate.