Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like ...

NASA’s Nancy Grace Roman Space Telescope launched on Aug. 30, 2026, beginning a journey that will take it about a million ...

There’s less Mercury in the system. Scientists found that Mercury, the solar system’s smallest planet, is shrinking far ...

Thousands of planets have been discovered beyond our solar system, offering clues to where life might thrive and whether ...

Astronomers have confirmed a world less than a million years old as the youngest known planet, using data from archives.

Astronomers have confirmed a Jupiter-size planet less than a million years old, making Elias 2-24 b the youngest known planet and giving scientists a rare look at a world still being born. Its ...

The BepiColombo mission, by the European Space Agency and the Japan Aerospace Exploration Agency, is only the third to study ...

Scientists have puzzled over why the planet dubbed "Earth's twin" doesn't have a moon. Computer simulations hint that if Venus ever did have one, it probably would've cannibalized its companion ...

Brown dwarf planet formation may be possible after Webb detected a disk around an object estimated at twice Jupiter’s mass.

After conducting additional calculations and observations, scientists have determined that the planet GJ 3378 b could ...

Add Yahoo as a preferred source to see more of our stories on Google. Are planets in the solar system that are closer to the Sun older than the ones further away? – Gavriel, age 10, Paducah, Kentucky ...

Sheppard joined Carnegie as a prestigeous NASA Hubble Fellow in 2004 and was appointed to a faculty position in 2007. He ...