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| Supernova's 'fizzled' gamma-ray burst Posted: 26 Jul 2021 11:48 AM PDT On Aug. 26, 2020, NASA's Fermi Gamma-ray Space Telescope detected a pulse of high-energy radiation that had been racing toward Earth for nearly half the present age of the universe. Lasting only about a second, it turned out to be one for the record books -- the shortest gamma-ray burst (GRB) caused by the death of a massive star ever seen. |
| Hubble finds evidence of water vapor at Jupiter's moon Ganymede Posted: 26 Jul 2021 10:21 AM PDT Astronomers have uncovered evidence of water vapor in the atmosphere of Jupiter's moon Ganymede. This water vapor forms when ice from the moon's surface sublimates -- that is, turns from solid to gas. Astronomers re-examined Hubble observations from the last two decades to find this evidence of water vapor. |
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