Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

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

Researchers believe they have rediscovered a mysterious star system first spotted in 2011. If true, the alien sun and its ...

New research shows that star activity can distort exoplanet measurements, affecting size, temperature, and atmosphere ...

This places it between Earth and Neptune in a size range that typically divides exoplanets ... expands our understanding of the diversity of planets (just like this strange object in our Solar System) ...

The article humorously imagines how planets would describe themselves if they were dating profiles. Each planet has a unique ...

Jan. 21, 2025 — Astronomers have discovered extremely powerful winds pummeling the equator of WASP-127b, a giant exoplanet. Reaching speeds up to 33,000 km/h, the winds make up the fastest jet ...

Most of the information we have about planets beyond our solar system (exoplanets ... This technique can give clues about the planet's size (by looking at how much starlight is blocked) and ...

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.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

The planet, dubbed TOI-6038A b, is a dense sub-Saturn size with a mass of 78.5 Earth masses and a radius of 6.41 Earth radii in a wide binary system.