Planet hunters have grown used to strange worlds, but a handful of discoveries now point to something even more radical: ...

One hundred light years away, a handful of planets are circling a star in the same configuration as when they formed. By Katrina Miller Astronomers have discovered six planets orbiting a bright star ...

The discovery of two remarkable substellar companions orbiting distant stars has been announced by an international team of ...

EVANSTON, Ill. — Except for the fact that we call it home, for centuries astronomers didn’t have any particular reason to believe that our solar system was anything special in the universe. But, ...

A newly discovered system of six planets circling a nearby Sun-like star may be the key to unlocking how planetary systems form. All between the size of Earth and Neptune, the worlds are orbiting in a ...

The James Webb Space Telescope (JWST) has just made a fascinating discovery, capturing an exoplanet shedding its atmosphere ...

For the inner four planets in this solar system, each planet orbits the sun three times for every two orbits of the planet immediately to its outside. For the fourth, fifth and sixth planets, they ...

This illustration shows an exoplanet orbiting around two brown dwarfs –– objects bigger than gas-giant planets but too small to be proper stars. ESO/M. Kornmesser Astronomers have discovered a ...

I've been wondering this for quite a long time. Why do the planets of our solar system all orbit the sun in (more or less) a single plane? Is it a random coincidence, or are there physical forces that ...

Each pair of planets completes their orbits in times that are the ratios of whole numbers, allowing the planets to align and exert a gravitational push and pull on the other during their orbit. This ...

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. When ...

During the weekend, the orbits of Earth and Saturn will combine to create an interplanetary optical illusion for anyone with ...