This is the period during which many scientists believe the young Earth collided with another nascent planet called Theia ... line in the outer regions of the young solar system.

Today, it’s believed that Jupiter and Saturn, the largest planets, were the first to fully form, both within a few million ...

"One of the reasons why this group is a key for the outer solar system understanding is [because] it contains all the cold-classical TNOs," she says. "The cold-classical TNOs are the only dynamic ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

The mystery of how planets and icy objects formed in the farthest reaches of our solar system just took an exciting turn. A ...

"One of the reasons why this group is a key for the outer solar system understanding is [because] it contains all the cold-classical TNOs," she says. "The cold-classical TNOs are the only dynamic ...

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

Stars whizzing by our solar system could cause more havoc than astronomers previously thought, from sending Pluto’s orbit haywire to forcing Mercury to fly into the sun – or even ...

TEHRAN (Tasnim) – Exploration of the outer solar system is offering critical clues about its history. Scientists have uncovered new details about the formation of distant icy worlds beyond Neptune.

At long last, particles of water–ice have been discovered in the frozen Kuiper Belt of another star. The discovery, made by ...