'Planet Hunters': Interview with Author Lucas Ellerbroek

Lucas Ellerbroek's new book, "Planet Hunters" (Reaktion Books, 2017), traces the history of exoplanet discovery back to a time when the idea of planets beyond our solar system was just science fiction — or heresy.

Giovanni Cassini Biography

Astronomer Giovanni Cassini discovered four of Saturn's moons, determined the distance from Earth to Mars and made successful measurements of longitude.

NASA and Russia Partner Up for Crewed Deep-Space Missions

NASA and the Russian space agency Roscosmos have announced a new partnership for human exploration of the moon and deep space. Both agencies signed a joint statement today (Sept. 27) at the 68th International Astronautical Congress in Adelaide, Australia.

Vibrant Aurora Australis Lights Up Antarctic in Astronaut Video

The crew of the International Space Station (ISS) shared stunning footage of the Aurora Australis, otherwise known as the southern lights. Italian astronaut Paolo Nespoli captured this beautiful display as the ISS passed over the Southern Hemisphere.