This star, known as HD 110067, may have even more planets. The six found so far are roughly two to three times the size of Earth, but with densities closer to the gas giants in our own solar system .

Astronomers using planet-hunting satellites have discovered a rare solar system with six planets moving completely in sync with one another, as if they were untouched by any outside force since ...

In a groundbreaking discovery, astronomers have identified TOI-1846 b, a super-Earth exoplanet located 154 light-years away.

“HD 189733 b is not only a gas giant planet, ... we aim to understand how planets form and if our solar system is unique in the galaxy.” Ad Feedback. Ad Feedback. Ad Feedback.

Beyond our solar system, countless alien worlds of lava, ice, water and noxious gas swirl through the cosmos. Here are some of the strangest exoplanets that scientists have discovered so far.

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show. Close. Advertisement.

Between February 25 and February 28, all seven planets in our solar system will be visible in the night sky. It's known as a planetary parade. You'll need a telescope for some of them, but you ...

Six planets were visible in January — four to the naked eye — and now a dim Mercury joins the gang. FILE – People look up to the sky from an observatory near the village of Avren, Bulgaria ...

This phenomenon known as a "planet parade," will feature Mercury, Venus, Mars, Jupiter, Saturn, Uranus and Neptune all present at the same time along a line in the night sky on Friday, NASA says.

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

“HD 189733 b is not only a gas giant planet, ... we aim to understand how planets form and if our solar system is unique in the galaxy.” Ad Feedback. Ad Feedback. Ad Feedback.