We know the upper limit on the speed of light in a vacuum, we refer to this as “c”. About 186,000 miles per second.
Does time itself have an upper limit on how fast it can go?
We know that time slows down in a gravitational field. If that is so, then time on the Moon. The Moon has a weaker gravitational field than the Earth, and also sits at the edge of the Earth’s gravitational field, therefore time on the Moon must run faster than on Earth.
If we move further away from the planet’s and the Sun, and out in to deep, deep space, between the inky blackness between the stars, time must therefore speed up even more.
Time slows down in a gravitational field. Time has to speed up due to the lack of a gravitational field.
How fast can time flow? What is the upper bound? Light has an upper bound. Does time?