Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly connected and spun together before separating into their current orbital ...

Planets with suns like Wolf 359 are subject to huge blasts of radiation that raise questions about their long-term ...

This once-in-a-generation shift is a pivotal power play in a saga that will unfold in the years and decades to come.

A powerful new tool comes online this year that could help astronomers locate the mysterious planet hiding somewhere beyond ...

While Charon is currently listed as a satellite or moon by the International Astronomical Union (IAU), consideration is being given to it perhaps being classified as a dwarf planet in its own right, ...

Scientists think a small rock discovered near Earth last August was hurled into space by an ancient impact on the lunar surface.

A six-planet alignment or parade will form an arc in the early night sky, peaking in it's visibility Jan. 17-18. We let you ...

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...