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

For the first time, astronomers have witnessed the early stages of planet formation around a distant young star, HOPS-315, ...

Comet C/2025 A6 (Lemmon) is this year’s brightest comet visible from Earth—an icy relic from the solar system’s origins that ...

The James Webb Telescope captures the beginning of planetary formation around the young star HOPS-315 for the first time.

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

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

Comet C/2025 R2 (SWAN) was discovered on Sept. 10 by Ukrainian amateur astronomer Vladimir Bezugly. It has brightened ...

Astronomers have made an unexpected and groundbreaking discovery in our solar system—a ring system forming around Chiron, a ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

A new study has proposed the existence of Planet Y, an alternative Planet Nine candidate that is smaller and closer to Earth ...

Ryugu’s samples reveal that water activity on asteroids lasted far longer than scientists thought, possibly reshaping ...

Comet Lemmon, also designated C/2025 A6, was discovered in January by a telescope scouring the night sky for near-Earth ...