Sixty-six million years ago, a massive asteroid struck Earth and caused the extinction of the dinosaurs, opening the way for mammals and eventually humans to dominate the planet. But what if that ...

Psyche’s twin cameras recorded long-exposure images of Earth and the Moon. From 180 million miles away, both appeared as faint dots.

Japan plans to join a European Space Agency mission to observe an asteroid set for a close flyby of Earth in 2029, a source familiar with the matter said Wednesday, with the project seen as crucial to ...