Computer simulations suggest that there is an undiscovered Earth-like planet lurking in the distant ... [+] Kuiper Belt, well past the orbit of Neptune (artistic illustration). There may be an ...

The mini-moon 2024 PT5, which has been orbiting Earth for two months and is likely a chunk of the moon, will now drift away ...

Forming an estimated 3 million years ago, the planet discovered by astronomers at the University of North Carolina is in its ...

A large planet has been spotted orbiting a dwarf star that is just 3 million years old, offering possible clues to how the ...

The team's hypothesis calls for a temporary ring around Earth, which would explain why impacts were constrained to a ...

Earth's "second moon" won't be sticking around for Thanksgiving, but just as many of us will on Thursday (Nov. 28), it seems ...