"While the Sun produces neutrinos that constantly bombard the Earth, there are also other neutrinos with much higher energies that are only rarely detected. Scientists have proposed that these higher-energy neutrinos are created in the most powerful events in the Universe like galaxy mergers, material falling onto supermassive black holes, and the winds around dense rotating stars called pulsars."
Newly released from NASA's CHANDRA x-ray observatory, this is new spiffy pic of Sagittarius A:
Credit: NASA (NASA/CXC/Univ. of Wisconsin/Y.Bai. et al.)
From "Sagittarius A*: NASA X-ray Telescopes Find Black Hole May Be a Neutrino Factory"
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