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Recent Podcast
Light Beyond the Bulb: Over and Beyond the Rainbow
Light Beyond the Bulb: Over and Beyond the Rainbow
While scientists and philosophers have tried to figure out exactly what light is for millennia, it's only been in the past several hundred years or so that we've really started to figure it out. (2015-07-01)


GB 1428+4217 in 60 Seconds

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Narrator (April Hobart, CXC): The most distant jet in X-ray light has been discovered using data from NASA's Chandra X-ray Observatory. This jet was found in the quasar known as GB 1428+4217, or GB 1428 for short. How does GB 1428 make its jet? When giant black holes pull in material at a very rapid rate, large amounts of energy are released. This results in the production of intense radiation and beams of high-energy particles that blast away from the black hole at nearly the speed of light. Astronomers call these beams of particles "jets". At a distance of 12.4 billion years from Earth, the jet in GB 1428 gives astronomers a glimpse into the explosive activity associated with the growth of giant black holes in the early Universe.

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