YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

NASA on Friday confirmed that it has moved up the return of stranded astronauts Butch Wilmore and Sunita Williams to ...

In a paper published earlier this month in Physical Review Letters, a team of physicists led by Jonathan Richardson of the ...

The research paper reports a breakthrough that will enable gravitational-wave detectors to reach extreme laser powers. It ...