The Sun sets differently on Mars. Part of that is due to its distance from the star (an average of 142 million miles versus ...

New data reveals a 3-million-light-year filament connecting two galaxies, each of which hosts a supermassive black hole.

As NASA plans to establish a permanent Moon base via its Artemis program, it is looking to avoid the dangers of lunar ...

"I'll always remember the first time I saw those iridescent clouds and was sure at first it was some color artifact." ...