These incredible images reveal the exact moment when planets began to form around a star 1,300 light-years from Earth.

Evidence that rocky planets beyond Jupiter formed as rapidly, and at the same time, as the inner planets could transform our ...

New simulations suggest that up to four of the solar system's rocky planets, including Earth and a long-lost world, once ...

Astronomers have captured the earliest stages of planet formation around a young sun-like star, offering a rare glimpse into ...

Image | Solar System Birth Caption: An image provided by the European Southern Observatory shows HOPS-315, a baby star where astronomers have observed evidence for the earliest stages of planet ...

RELATED STORIES — Vesta, the 2nd-largest asteroid in the solar system, may be a piece of a lost planet — Ancient zircon crystals shed light on 1 billion-year-old meteorite strike in Scotland ...

First images of new solar system forming help explain Earth's own origins 'This discovery is a snapshot of an environment that is very similar to our Solar System, but at a much earlier stage of ...

The long-theorized Planet 9, which astronomers have speculated could be a Neptune-sized planet that has been lurking on the outer edge of the solar system, could explain the unusual clustering and ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as number nine in 2006. Now, a group of international researchers say they may ...

This mismatch “doesn’t mean it’s not there, but it means it’s not Planet 9,” Brown said. “I don’t think this planet would have any of the effects on the solar system that we think we ...