Gamma rays
Surprise! Classical Novae Produce Gamma Rays
In a classical nova, a white dwarf siphons material off a companion star, building up a layer on its surface…
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…
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…
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…
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…
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…
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…
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…
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…
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…