Wednesday 16 August 2017

Supermassive black holes feed on cosmic jellyfish

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Observations of 'Jellyfish galaxies' with ESO's Very Large Telescope have revealed a previously unknown way to fuel supermassive black holes. It seems the mechanism that produces the tentacles of gas and newborn stars that give these galaxies their nickname also makes it possible for the gas to reach the central regions of the galaxies, feeding the black hole that lurks in each of them and causing it to shine brilliantly.
via Science Daily
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Perseid by the Sea

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Just after moonrise on August 12 this grain of cosmic sand fell by the sea, its momentary flash part of the annual Perseid Meteor Shower. To create the Perseid meteors, dust along the orbit of periodic comet Swift-Tuttle is swept up by planet Earth. The cometary debris plows through the atmosphere at nearly 60 kilometers per second and is quickly vaporized at altitudes of 100 kilometers or so. Perseid meteors are often bright and colorful, like the one captured in this sea and night skyscape. Against starry sky and faint Milky Way the serene view looks south and west across the Adriatic Sea, from the moonlit Dalmatian coast toward the island of Brac.

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Meals for Your Eclipse Menu

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In parts of the United States, the eclipse will occur around lunchtime. Consider planning a picnic. (At least, have a crescent-shaped cookie.)
via New York Times

Sneak peek in colour

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A preview of Gaia’s sky in colour provides a taste of the full-colour map of more than a billion stars that will be released next year
via ESA Space Science
http://sci.esa.int/gaia/59404-sneak-peek-of-gaias-sky-in-colour/