
Exoplanets - NASA Science
An exoplanet is any planet beyond our solar system. Most of them orbit other stars, but some free-floating exoplanets, called rogue planets, are untethered to any star. We’ve confirmed more than 5,800 exoplanets out of the billions that we believe exist.
In Depth: Exoplanets - Science@NASA
3 days ago · An exoplanet, or extrasolar planet, is a planet outside of our solar system that usually orbits another star in our galaxy. Exoplanets – planets outside our solar system – are everywhere. But why do we study them? What makes them so interesting?
Exoplanet - Wikipedia
An exoplanet or extrasolar planet is a planet outside the Solar System. The first possible evidence of an exoplanet was noted in 1917 but was not then recognized as such. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main-sequence star was in 1995. A different planet, first detected ...
What Is an Exoplanet? | NASA Space Place – NASA Science for …
Jan 14, 2025 · What Is an Exoplanet? The Short Answer: All of the planets in our solar system orbit around the Sun. Planets that orbit around other stars are called exoplanets. Exoplanets are very hard to see directly with telescopes. They are hidden by …
What is an exoplanet? - Science@NASA
Oct 29, 2024 · What is an exoplanet? The worlds orbiting other stars are called “exoplanets,” and they come in a wide variety of sizes, from gas giants larger than Jupiter to small, rocky planets about as big around as Earth or Mars. They can be hot …
Exoplanets: Everything you need to know about the worlds …
Nov 14, 2023 · Exoplanets are planets that orbit stars other than the sun and thus exist outside the solar system. The word "exoplanet" derives from the term "extrasolar planet,"...
Exoplanets - National Geographic
For centuries, planets beyond our solar system—called exoplanets —existed only in theory and science fiction. It seemed nearly impossible to detect planets light-years away, since the relatively...
Exoplanets, worlds beyond the Solar System - The Planetary Society
An exoplanet, short for “extrasolar planet,” is any planet that isn’t in the Solar System. Some are gas giants like Jupiter and Saturn, some are rocky like Mercury or Mars, and others are icy like Neptune or Uranus.
ESA - What are exoplanets? - European Space Agency
An exoplanet is a planet outside our own Solar System, sometimes referred to as an extrasolar planet. More than 5000 exoplanets have been confirmed. Some are massive, like Jupiter, but orbit much closer to their host star than Mercury does to our Sun.
Exoplanets 101 - Education
May 22, 2024 · Exoplanets are worlds that exist outside of our solar system. Also known as extrasolar planets, these bodies often orbit their own stars, with some being a part of entire planetary systems. Exoplanets are made of the same elements as the worlds in our solar system.