The asteroid, known as 2022 RD2, belongs to a rare class of space rocks called Arjunas. These objects travel around the sun ...

Potential impactors are most likely to have low velocities and the highest likelihood of hitting Earth during the winter.

If an asteroid is on a collision course with the moon, what should humanity do? Try to nudge the space rock out of the way before it strikes? Obliterate it with a nuclear explosion? Such a cosmic ...

European Space Agency says milestone highlights both Earth’s vulnerability and advances in planetary-defense science - ...