New visions reveal the violent universe
The Fermi Gamma-Ray Space Telescope is peering into active galaxies, pulsars, and gamma-ray bursts — and even quantum gravity.
Scientists using NASA’s Fermi Gamma-ray Space Telescope have discovered pulsars that apparently pulse only in gamma rays.
What we’ve learned about a strange new world
Cassini’s 5-year exploration has revealed the saturnian moon’s atmosphere, mountains, dunes, rivers, lakes, and seas. And we should expect many more discoveries.
This saturnian moon could be the Earth of the outer solar system.
Astronomy’s 5 big questions
Science now looms closer than ever to solving the biggest mysteries in the universe.
Find answers to questions about the number of planets in the solar system, the search for extraterrestrial life, and more.
Totality crosses Easter Island
Here’s what you need to know if you’re planning to see July’s solar eclipse.
Make your plans now to see an upcoming total solar eclipse.
Astro-Tech’s AT6RC offers great imaging on a budget
High-quality optics and mechanics make this 6-inch Ritchey Chrétien telescope one astroimagers will appreciate.
This Month in Astronomy
Bob Berman’s Strange Universe
Glenn Chaple’s Observing Basics
The Sky this Month
Stephen James O’Meara’s Secret Sky
David H. Levy’s Evening Stars
The Cosmic Grid