There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

This video explains why planets in our solar system orbit in nearly the same plane, tracing their origins back to a rotating protoplanetary disc of dust and gas that formed around the young Sun. It ...

Mars is known for its barren desert landscape and dry climate. But two recent studies go beneath the surface: They explore the interior of the red planet using seismic data from NASA's InSight mission ...