When we talk about rocky planets, we often imagine Earth: a dense metallic core, a silicate mantle, and a thin atmosphere.

Astronomers have spotted an unusual planetary system with a rebellious rocky planet orbiting well beyond where it would be expected to form. And in the newly spotted system of four planets, the first ...

The new findings do not directly solve that mystery, but they provide a possible microscopic mechanism for directional transport deep inside planets. “Such behavior could influence interior energy ...

A bright ring of dust circling a young star can look calm from far away. In reality, it may mark one of the messiest moments ...

Astronomers have found a planetary system that seems to have formed inside-out. While most systems, like our own, have rocky planets closest to their star and gaseous ones further out, the LHS 1903 ...

A distant world may have formed inside a doomed star. This star was ripped apart by its smaller, denser companion – a dense stellar corpse called a white dwarf – and the planet could have formed from ...

"Every new result can reshape our understanding of planets, their habitability, and our place in this universe." When you purchase through links on our site, we may earn an affiliate commission.

The curious minds at What If explore how many Earths could fit inside each planet in this simulation.

Alpha Centauri, one of the two "Pointer Stars" that help stargazers find the Southern Cross in the Southern Hemisphere, may have a planet in orbit around it. If it does, the Webb Telescope will find ...