roche limit

At this time, scientists who are theoretical experts in many different fields are trying to guess how the rings around the dwarf planet Quaoar exist.

If Mars and Earth swap places in the Solar System, life on Earth will not be able to exist and we will no longer be able to live.

In the vast universe, the black hole is probably the most feared 'evil spirit' we have ever known. With enormous gravity, no matter, not even light, can escape the black hole if