Arquivos de Tag: Dust

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Sampling Chernobyl’s Elephant’s Foot Reveals AK-47s and Radioactive Dust

Posted on by bigboss
15
set

After a botched turbine test on the night of April 26, 1986, operators at Chernobyl’s Unit 4 disabled the remaining safeties and let the bottom of the RBMK core run free. A steam explosion flipped the reactor lid. Fuel, zirconium cladding, steel, graphite, sand, and concrete liquefied, burned through two meters of reinforced floor, and […]

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Webb Showcases How IRS 3 Still Makes Dust and Water 0.55 Light-Years From Sagittarius A*

Posted on by bigboss
11
set

Webb’s NIRCam and MIRI cameras filled a 2.5-by-1.8-arcminute frame with the inner parsec of the Milky Way, a packed star field 26,000 light-years away in Sagittarius. IRS 3 sits in that crowd, a cool, luminous asymptotic giant branch star only 0.55 light-years from Sagittarius A*, the four-million-solar-mass black hole at the center of the galaxy. […]

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