NASA's official science hub covering astrophysics, planetary science, Earth science, and heliophysics. A reliable starting point for any space topic.

The center of NASA's robotic space exploration. Follow active missions, access spacecraft data, and explore discoveries from across the solar system.

Authoritative orbital and physical data for planets, moons, asteroids, and comets. The source behind much of the data used on this site.

News, imagery, and educational resources from the Hubble Space Telescope — one of the most productive scientific instruments ever built.

News, imagery, and science from NASA's most powerful space telescope. Observes the universe in infrared, revealing distant galaxies, exoplanet atmospheres, and more.

One of the most widely read space news sites. Covers breaking news, missions, and astronomy topics in an accessible, engaging format.

News, observer guides, and in-depth articles on planets, galaxies, and the latest discoveries. Great for beginners and enthusiasts alike.

A trusted resource for skywatching guides, equipment reviews, and professional astronomy news — published since 1941.

The world's largest independent space advocacy group. Covers space exploration, missions, and space policy in an approachable, engaging way.

A free, searchable library of millions of peer-reviewed papers in astronomy, astrophysics, and physics. Essential for diving into primary research.

Free access to preprint research papers before formal publication. A great way to read cutting-edge science as it happens.

The definitive catalog for identifying stars, nebulae, clusters, and other galactic objects — used by professional astronomers worldwide.

Comprehensive data on objects outside our galaxy — including galaxies, quasars, and radio sources. Maintained by Caltech and NASA.

A research institute providing planetary science resources, datasets, and educational materials — including resources for teachers and students.

The public face of the NRAO, home of the Very Large Array (VLA). Explains radio astronomy and its discoveries in accessible terms.

Research and news on the search for extraterrestrial intelligence, astrobiology, and the potential for life beyond Earth.

The official USGS resource for the names and locations of surface features across every body in the solar system — from craters to valleys.

Daily summaries of new astrophysics papers written by graduate students — bridging the gap between technical research and general audiences.