Mercury takes only 88 Earth days to orbit the sun.

You'll be able to easily see four planets in the February evening sky ... After attaining opposition with the sun last month, Mars is now moving away from Earth and consequently is now gradually ...

These rocky bits eventually coalesced to form the terrestrial planets. However, at a distance of around 4 astronomical units from the Sun (AU ... in the outer solar system. This first-order ...

New James Webb Space Telescope observations of a star cluster called NGC 346 are shedding light on how, when and where planets formed in the early universe.