In order to understand how long one hour is in space, we need to first understand a bit about Special Relativity.
Special Relativity is a theory of physics that was developed by Albert Einstein in the early 1900s. It explains how time works in different situations.
One of the key ideas of Special Relativity is that time is relative. This means that time can pass at different rates depending on your perspective. For example, if you are moving very fast, time will appear to slow down for you. This is because, from your perspective, the world is moving by you very quickly.
So, how does this relate to the question of how long one hour is in space?
Well, it turns out that, from the perspective of an observer on Earth, one hour in space is actually seven years!
This is because, due to the effects of Special Relativity, time passes more slowly for objects that are moving very fast. So, from the perspective of someone on Earth, an object that is moving at the speed of light (which is what astronauts are doing when they are in space) will appear to be moving very slowly.
As a result, one hour in space is actually seven years on Earth!
Of course, this doesn’t mean that astronauts age seven times more slowly than people on Earth. It just means that, from our perspective, time appears to move more slowly for them.