Friday, April 17, 2015

The History of Dust

Something to consider.   Elements associated with the formation of planets and stars (carbon, oxygen, iron, etc) are combined in cosmic dust.  But here's the thing: the early galaxies didn't have a lot of dust, just gas.  So where'd the dust come from?

Indications are that exploding supernovas generate a lot of dust but supernovas are also extremely hot. How would the dust survive?

Researchers from Cornell, using SOFIA, studied the supernova remnant Sagittarius A East, and determined that between 7 and 20% of the dust created had survived the shock wave.

Heavy element goodness in you, me, and the rest of the place more likely brought by supernovae.

Read: Old Supernova Dust Factory Revealed at the Galactic Center, Science, 3/19

--CDC--


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