How can superflares affect alien life on planets orbiting alien suns.
The asteroid Bennu is seen shedding material to space. Here’s a look at why its happening, and what it means for NASA’s OSIRIS-REx mission.
Rust on the Moon shouldn’t be possible, but there it is — so how did it form? Actually, Earth may be to blame.
Astronomers have long suspected the presence of black holes larger than those created by stars, but smaller than those at the centers of galaxies. Now, they’ve found one.
A twin star of the Sun, born with our parent star, may still be floating somewhere in space.
A mysterious planet — called Planet 9 or Planet X — may be hiding at the edge of our solar system. Will we ever find this world?