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

When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

The exoplanet HD 20794d swoops in and out of its habitable zone every few hundred days, making for an extreme climate.

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.

Astronomers have found evidence for what might be a planet with about half the ... The pulsar is locked in a 1.6-day orbit with one white dwarf, and both of them are orbited by another white ...

Beyond Neptune lies the Kuiper Belt, a vast expanse of icy bodies that may hold clues to the solar system’s formation. These ...

The building blocks of life could have been delivered to Ceres by one or more space rocks from the outer asteroid belt.

After 11 years in solar orbit, the European Space Agency’s Gaia ... Gaia has also strengthened the hypothesis that our own yellow dwarf star formed much further in towards the center of our ...

Jan. 15, 2025 — Hot Jupiters are giant planets initially known to orbit alone close to their star. During their migration towards their star, these planets were thought to accrete or eject any ...

The Dawn space probe found organic molecules on the dwarf planet around ten years ago. A Max Planck team used AI to investigate where they came from. During measurements with the spectrometer ...

This update transformed familiar worlds, turning my placid and boring home world into a planet covered by gorgeous glowing grasses. On Wednesday, Hello Games revealed the follow-up, Worlds Part 2 ...