There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than the hypothesized Planet Nine.

When it comes to science, a simple observation can upend everything you think you know, such is the case with one star ...

Siraj’s Planet Y search started about a year ago when he was trying to find out whether the shape of the Kuiper Belt is flat. “The planets of the solar system have slight tilts up and down, but ...

A mysterious space object named 2023 KQ14, nicknamed “Ammonite,” challenges theories about the mysterious and possible Planet ...

A recent study by Princeton University astronomers suggests the possible existence of a previously undetected planet in our ...

Planets do not emit visible light like stars; they shine in the sky because they reflect sunlight. Exoplanets too reflect starlight, and nobody does it better than LTT9779b. This world reflects 80 ...

In the remote outer reaches of planetary systems, far beyond the orbit of known planets, enormous and mysterious worlds silently loop around their stars. Some drift as far as 10,000 times the distance ...

"It shows that Makemake is not an inactive remnant of the outer solar system, but a dynamic body where methane ice is still ...

Astronomers are tracking strange orbital patterns in the outer Solar System that suggest a massive unseen planet may exist ...

Earth has a new cosmic companion, a 19-meter asteroid named 2025 PN7, discovered in August 2025. This 'quasi-moon' will orbit ...