Name me some other examples of languages in Europe like the euskara then. Name me examples in Europe of languages that go back millenia that have stayed relatively isolated and became their own language group. Because that was the original topic in this comment threat.

Sounds like a good video on the topic will help you out more than a comment about it. It will visualise the process.

You can line them up when the object stays the same whilst photographing, which is the case with most space objects. When you then get many almost identical photo's you can use software to stack those photo's on top of each other.

There's another thing you need to know; the more light reaches the sensor of your camera, the more data you have, the more detail you can get in the end result. So when you take many photo's you have a lot of data and thus a lot of detail as well, when everything goes right that is.