An alien planet orbits a star other than our sun, and is sometimes called an "exoplanet." Learn more about the types of alien planets, including exoplanets and extrasolar planets, and get the latest news.
In a planetary-science first, astronomers used their knowledge of Jupiter's magnetic field to model what kinds of radio signals might be emitted naturally by the fields of smaller, rocky worlds.
Some alien planets in multiple-star systems — such as the two-sun Tatooine, Luke's home world in the "Star Wars" universe — may indeed nestle in orbits that are stable for long stretches of time, a new study suggests.
Researchers have identified more than 100 giant exoplanets that could have potentially life-hosting moons. The new analysis could change the way scientists search for life in the cosmos, study team members said.