A hot, rocky planet discovered using the Kepler space telescope is the smallest ever found outside our solar system. The new planet, called Kepler-37b, has a radius less than a third the size of Earth ...

Mars holds a special place in the solar system. It represents marginal habitability. This means it transitioned from warm and ...

Scientists have discovered a bizarre planetary system where a rocky world orbits farther out than giant gas planets, defying ...

A groundbreaking new study of small, rocky extrasolar planets has made a tentative statistical correlation between the planets’ chemical makeup and their parent stars’ birthplace within our Milky Way ...

A dense metallic core, a silicate mantle, and a thin atmosphere on top—this familiar internal structure of rocky planets may ...

There are few ideas in science that capture the imagination quite like the search for extraterrestrial life. From Mars ...

A new study suggests Mars could help scientists understand how alien worlds evolve by showing how a once warmer, wetter ...

The familiar concept of a planetary core, a small, dense metallic heart we take for granted, may be the exception rather than ...

Rocky planets are typically found near their star, while gas giants form farther out — not the other way around. When you purchase through links on our site, we may earn an affiliate commission.