A planetary system 116 light-years from Earth has a peculiar pattern. It could flip the script on how planets form, ...

By Will Dunham WASHINGTON, Feb 14 (Reuters) - Astronomers have observed a planetary system that challenges current planet ...

A closer look at the planets around a star called LHS 1903 may just flip our understanding of how planetary systems form.

Astronomers have found a compact solar system whose planets line up in a way that, according to current models, should not be possible. Around the small star LHS 1903, a dense rocky world orbits on ...

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

With this new survey, astronomers have gained a peek inside a stage of exoplanet system formation they have yet to fully ...

Updated measurements from NASA’s Juno spacecraft could help researchers better understand the planet's mysterious interior, ...

Stargazers can see six planets all in one evening during the second month of the year, especially Mercury, which is usually ...

When the Sun runs out of hydrogen fuel and expands into a red giant, it will eventually encompass the innermost planets of the solar system, out to about Earth’s orbit. Being closer to our enlarged ...

Gas giants are large planets mostly composed of helium and/or hydrogen. Although these planets have dense cores, they don't ...