Mercury has long baffled astronomers because it defies much of what we know about planet formation. A new space mission ...

Webb telescope discovered a bizarre exoplanet with carbon atmosphere, no hydrogen, orbiting a super-dense spinning star.

When astronomers first cataloged some of the closest orbiting rocky exoplanets, they wrote them off as bare, airless cinders, ...

TOI-561 b, a rocky exoplanet roughly twice the mass of Earth, orbits its host star at a blistering pace, about forty times ...

One of the biggest features of Mars affecting the weather there is dust. Because Mars is smaller than Earth, it has lower gravity at around one-third of the strength of gravity on Earth (via NASA).

With sapphire waterfalls, lava rain and orbits around dead stars, these distant worlds push the limits of what’s possible.

A new study using data from NASA’s Spitzer Space Telescope provides a rare glimpse of conditions on the surface of a rocky planet orbiting a star beyond the Sun. The study, published today in the ...

A photo of Jupiter taken by NASA's Juno spacecraft in September 2023. NASA/JPL-Caltech/SwRI/MSSS, image processing by Tanya Oleksuik The planet Jupiter has no solid ...

Pluribus imagines Kepler-22b as an ocean world that sends a gift to humanity through radio waves. In real life, no such ...

New research suggests Mars could have enough water under its surface to form a global ocean. On Monday, scientists released their findings, which are based on seismic measurements captured from NASA’s ...

When a planet transits in front of its parent star, some of the light is not only blocked, but if an atmosphere is present, filters through it, creating absorption or emission lines that a ...