In a cosmic first, scientists say they have detected a planet that may have formed from the burned remains of its dead host star. When a sunlike star dies, it first rapidly expands into a red giant ...

A dead star’s wreckage may be the birthplace of a new planet. The existence of second-generation planets was predicted theoretically more than 15 years ago. But this “phoenix” world, if confirmed, ...

Planets without stars to orbit raise important questions about how planets evolve and what habitability might look like across the cosmos. Rogue planets careen through interstellar space without the ...

Astronomers have spent years searching for a possible hidden giant planet far beyond Neptune. Unusual orbits among distant Kuiper Belt objects have fueled the Planet Nine theory, but recent ...

Our solar system has two ice giants, Uranus and Neptune, but there may have been a third. According to a new study published in the journal Icarus, this extra world might have triggered a violent ...

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A researcher discovered the rare cosmic event by noticing strange dips in a star's brightness in old telescope data. The collision created a hot cloud of rocks and dust, which researchers detected ...

The latest "planet parade" is set to cap off February by lighting up the night sky. Jupiter, Saturn, Venus, Neptune, Uranus and Mercury will appear to line up. While this one isn't quite the full ...

This is a parade you won't want to miss, so mark your calendars and get ready to look up at the sky over the weekend. Usually, people can look up at the bright sky and spot at least one planet. Two or ...

Planets are always lined up along the same celestial path, so this “parade” is all about timing Six planets will appear along the same stretch of sky just after this weekend, with the best views ...

Stars and planets are inextricably linked. They form together and stars shape the fate of planets. Stars create the dusty protoplanetary disks that give birth to planets of all kinds. And when a star ...