How can scientists use spin as a fossil record for planetary evolution? This is what a recent study accepted for publication ...

Brown dwarfs get a bad rap in the stellar world, often labeled as "failed stars" for their inability to sustain nuclear ...

Spin separates giant planets from 'failed stars' Clearest evidence yet that giant planets spin faster than their cosmic ...

For decades, astronomers have struggled to differentiate giant planets from brown dwarfs, a class of objects more massive than planets but too small ...

Kepler-51d is a giant, ultra-light “super-puff” planet wrapped in an unusually thick haze that’s blocking scientists from ...

Astronomers have identified a strange new kind of exoplanet that challenges how scientists classify worlds beyond our Solar System. The planet, L 98-59 d, appears to contain a vast ocean of molten ...

How does fine dust aggregate into building blocks that ultimately form entire planets like our Earth? A research team led by ...

Scientists have uncovered a hellish “lava world” where temperatures soar to a blistering 2,700 degrees Fahrenheit — hot ...

NASA chief Jared Issacman appears to be among those who support Pluto being reclassified as a planet. Could President Trump ...

The boundary between stars and planets appears increasingly indistinct. Objects such as brown dwarfs, neither fully stars nor ...

Astronomers have detected an Earth-size planet candidate orbiting a nearby star once a year, making it a promising target for ...