The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Canadian astronomers have taken an extraordinary step in understanding how planets are born, using the James Webb Space ...

For the first time, astronomers have imaged dozens of belts around nearby stars where comets and tiny pebbles within them are ...

Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system. These embryos, somewhere between small planetesimals and fully formed planets ...

While the composition of gas and dust in a molecular cloud is fairly uniform, everything changes once a star begins to form.

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object ...

Jan. 15, 2025 — New observational data and simulation models have confirmed a new type of planet unlike anything found in the Solar System. This provides another piece of the puzzle to ...

"With an orbital period of 570 days, it is a relatively cold gas giant planet," said Guðmundur Stefánsson of the University ...

People will be able to see a rare sight at the end of this month when all seven other planets in our solar system line up in the night sky. For the last few weeks six of the planets have been ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...