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Posts Tagged "gamma rays"

Basic Space

Massive Stars Create ‘Cocoon’ of Cosmic Rays

Cygnus X is a star forming region in the constellation Cygnus in the night sky. It looks rather pretty in visible light, as shown at the beginning of the video below. But in radio, infrared and gamma ray wavelengths, Cygnus X really comes to life. Recent Fermi Large Area Telescope (LAT) observations have shown that [...]

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Critical Opalescence

Charismatic Megaparticles Might Hint at Dark Matter, and Much Besides

At a lecture I went to some years ago, astrophysicist Trevor Weekes compared garden-variety elementary particles to mosquitoes. They are plentiful and easy to find—indeed, they find you. But ultra-high-energy gamma rays, he said, are like elephants. They are fairly rare, but among the greatest of creatures. They often roam in spectacular habitats. Their sheer [...]

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Observations

Fermi Satellite Tracks Cosmic-Ray Origins Back to Supernova Remnants

Supernova shock wave

The cosmos is full of surprises—not a week goes by without some group of astronomers announcing a perplexing new discovery that upends theory or expectation. But equally important is the difficult and time-consuming research required to firmly pin down what astronomers think they already know. Take, for instance, a new study on the origins of [...]

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The Countdown

The Countdown, Episode 2: A Mars Party, Star versus Black Hole, Thunderous Gamma Rays, Meteoroid Fireworks, Money for Space Taxis

Story 5 NASA’s Curiosity rover touched down on Mars early Monday morning, setting off a worldwide celebration. Links: NASA’s Curiosity Rover Lands Safely on Mars Video: NASA Lands Car-Sized Rover Near Martian Mountain Curiosity Targets Gale Crater Mars Party of the Decade Reaches Fever Pitch Story 4 Black holes have the size and mass to [...]

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