Earth's shape can be tested in surprisingly simple ways without relying on space photographs. The strongest part of the ...

Mars is the obvious frontrunner, but it is far from an easy second home. The other candidates reveal just how rare truly human-friendly conditions may be.

Most scientists think that Earth and Mars took shape this way from rocky pieces swirling around the young sun around 4.5 ...

Flat Earth theory can be tested without relying on space photographs or one institution. Several independent observations ...

A rocky planet in the Milky Way galaxy may have an atmosphere, raising the possibility that life could exist on its surface, according to experts. TRAPPIST-1e, a planet belonging to a collection of ...

Planetary science is the study of the celestial bodies that orbit stars, with a particular focus on our own solar system. This includes studying the formation and evolution of planets, the moons and ...

Molten rock deep inside Earth can take up an extra supply of oxygen under pressure, according to a new study. That finding ...

Meet Teek and Tom! In NOAA’s new five-part animated science series: “Teek and Tom Explore Planet Earth,” an intrepid student explorer Teek from planet Queloz teams up with NOAA climate scientist Tom ...

Scientists believe there are planets outside our solar system where life is even more abundant and sustainable.

A new study presents a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are 1 to 4 times the size of Earth and among the most common in our galaxy. Using ...

Scientists have identified three Earth-sized planets orbiting two stars in the TOI-2267 system. Remarkably, planets transit around both stars — a first in astronomy. The system’s compact, cold nature ...