About 37,600,000 results
Open links in new tab
  1. Exoplanet - Wikipedia

    An exoplanet or extrasolar planet is a planet outside of the Solar System. The first confirmed detection of an exoplanet was in 1992 around a pulsar, and the first detection around a main …

  2. 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 …

  3. What is an Exoplanet? Definition, Discovery, and Types Explained

    Jul 28, 2025 · At their core, exoplanets are planetary bodies bound by gravity to a star (or sometimes two, or more). Unlike stars, they don’t shine by fusion; they reflect the light of their …

  4. ESA - What are exoplanets? - European Space Agency

    What are exoplanets? 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 …

  5. Exoplanets explained | BBC Sky at Night Magazine

    Nov 24, 2025 · Exoplanets are planets orbiting distant stars beyond our Solar System, and since the first confirmed discoveries in the 1990s, astronomers have found all manner of weird and …

  6. 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," which hints …

  7. Exoplanets, worlds beyond the Solar System - The Planetary Society

    What are exoplanets? 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 …

  8. What Is an Exoplanet? A Brief Explainer - ExtremeTech

    Dec 21, 2024 · An exoplanet is a planet from a different star system. Most known exoplanets orbit stars within the Milky Way, but with the help of powerful space telescopes, scientists have …

  9. What Are Exoplanets? - astrotouring.com

    Apr 12, 2025 · An exoplanet, or extrasolar planet, is a planet located outside our solar system. Most of them orbit distant stars, much like Earth orbits the Sun. Astronomers have confirmed …

  10. Exoplanets - NASA Science

    Sep 17, 2025 · Exoplanets 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 …