See a time-lapsed view of the NASA Artemis 1 Orion spacecraft, Earth and moon that was captured on Nov. 29, 2022. Credit: ...

Astronomers have long puzzled over Mars's unusual geography and triaxial shape. A new hypothesis by Michael Efroimsky of the U.S. Naval Observatory suggests that these distinct features might be due ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. New research suggests that most of the solar system's inner rocky planets once orbited the sun in ...