The majority of stars in our galaxy are home to planets. The most abundant are the sub-Neptunes, planets between the size of Earth and Neptune. Calculating their density poses a problem for scientists ...

(Phys.org)—An international team of astronomers reports the discovery of a Neptune-mass exoplanet with a density comparable to Earth's. According to the research, the newly detected alien world, ...

Since its launch two years ago, NASA's Transiting Exoplanet Survey Satellite (TESS) has scoured the skies to search for strange alien worlds spread out in different parts of the universe. Throughout ...

The planets in our solar system weren't always in the order they are today. Four billion years ago, early in the solar system's evolution, Uranus and Neptune switched places, according to new work by ...

How do we know anything about the winds on these remote planets? The main sources of information date back to the close encounters of the Voyager 2 spacecraft with Uranus (in 1986) and Neptune (in ...