Astronomers have uncovered evidence of a rare second-generation planet orbiting a dead star, suggesting new worlds can form ...

Way back in 1999, NASA's Hubble telescope gathered data from a white dwarf star codenamed HS 0209+0832 with 100 chemical ...

Our Solar System is home to many unique planetary bodies, including protoplanets and dwarf planets. Here are the unique ...

Anyone who grew up learning that our solar system has nine planets probably remembers the moment Pluto got demoted. That decision back in 2006 wasn't just paperwork. It came from a real, testable set ...

The “second-generation” world, predicted from telescope data, could be the first known planet of its kind, and it may shed ...

“It’s a chemical signature no ordinary, ‘first-generation’ planet should carry, which told us that this new planet was ...

Scientists discover unique ‘phoenix’ planet that was born from a dying star - World is made up of pieces of a dying sun, ...

In 2006, Pluto was famously demoted from a planet to a dwarf planet. It remains the most famous dwarf planet today, but there are others in our solar system, including potentially hundreds that ...

A dead star’s wreckage may be the birthplace of a new planet. The existence of second-generation planets was predicted ...

In ancient mythology, the phoenix was a miraculous bird with a cyclical pattern of life and death, perishing in flames only ...

A color-enhanced view of Ceres, the nearest dwarf planet to Earth, high­lights its Oc­ca­tor crater. Credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA Pluto is the most famous dwarf planet, due in ...

New observations reveal that the far-flung object 2014 UZ224 (informally known as DeeDee, for "Distant Dwarf") is about 395 miles (635 kilometers) wide — big enough to claim "dwarf planet" status.