Gamma rays

Observing Alert: Distant Blazar 3C 454.3 in Outburst, Visible in Amateur Telescopes

Have an 8-inch or larger telescope? Don't mind staying up late? Excellent. Here's a chance to stare deeper into the…

10 years ago

Weekly Space Hangout – January 10, 2014: Wake Up, Rosetta! & Top Stories from AAS

Host: Fraser Cain Guests: David Dickinson, Amy Shira Teitel, Scott Lewis, Brian Koberlein, special guest Ruth McAvinia from the ESA…

11 years ago

Navy Researchers Put Dark Lightning to the SWORD

Discovered "by accident" by NASA's Fermi Gamma-ray Space Telescope in 2010, dark lightning is a surprisingly powerful -- yet invisible…

11 years ago

Bright Blazar’s Emission Defies Explanations

When it comes to sheer wattage, blazars definitely rule. As the brightest of active galactic nuclei, these sources of extreme…

12 years ago

Black Holes, Fermi Bubbles and the Milky Way

Deep at the heart of our galaxy lurks a black hole. This isn't exciting news, but neither is it a…

12 years ago

Cosmic Rays and Exploding Stars

Scientists have known about cosmic rays for a century. But these high-energy subatomic particles, which stream through space at nearly…

12 years ago

Supernovae Seed Universe With Cosmic Rays

In a wave of media releases, the latest studies performed by NASA's Fermi Gamma-ray Space Telescope are lighting up the…

12 years ago

Cygnus X – A Cosmic-ray Cocoon

[/caption] Situated about 4,500 light-years away in the constellation of Cygnus is a veritable star factory called Cygnus X... one…

13 years ago

Positron Signaling For Dark Matter Inconclusive

[/caption] A couple of years ago, the Payload for Antimatter Matter Exploration and Light-nuclei Astrophysics, PAMELA, sent us back some…

13 years ago

The Crab Gets Cooked With Gamma Rays

[/caption] It's one of the most famous sights in the night sky... and 957 years ago it was bright enough…

13 years ago