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

A tiny object far beyond Pluto, newly discovered by the Subaru Telescope, could reshape our understanding of the early Solar System. Named 2023 KQ14, this rare “sednoid” follows an unusual orbit that ...

Historically, most planet names have come from the pantheon of Greek or Roman gods, however there is no guarantee that pattern will continue. The internet collectively seems likely to nominate ...

Astronomers have discovered a "fossil" world lying in the outskirts of the solar system, according to new research.

Astronomers first identified these minerals using the now-three-year-old James Webb Space Telescope. To see where exactly the ...

The solar system remains a dynamic and mysterious place. Every new object like 2017 OF201 adds a piece to the puzzle. Whether or not we ever actually solve the mystery of Planet Nine , though ...

This artist’s concept depicts one of the solar system’s inner planets slamming into Earth after being nudged on a collision course by a passing star. Such a world-shattering cataclysm is ...

The Protoplanetary Disk and Planet Formation. Approximately 4.6 billion years ago, our solar system originated from a vast cloud of gas and dust known as the solar nebula.

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new dwarf planet. It's called 2017 OF 201, a rock that appears to be some 700 ...

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

If there were one, that Planet Nine would "nudge the closest part of 2017 OF201's trajectory inward until Neptune flung it out of the solar system." Because 2017 OF201 is there, that could be an ...

Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, researchers say. ABC News. Live. Video. Shows. Shop. Log In. Stream on.