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POPSGalaxies found to be flowing together "He said another interesting idea proposed since the cosmic flow was detected is that instead of a gravitational pull by something beyond the observable universe, the galaxies are being pushed by an absence of mass in the local universe."
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POPSYoungest Exploded Star In The Milky Way Is Discovered
It turns out, Green and his team came across the remnants, now called G1.9+0.3, more than 20 years ago using the Very Large Array (VLA) radio telescope in Socorro, NM, and estimated the object’s age to be 400-1,000 years old. It is near the center of the Milky Way, some 25,000 light-years from Earth. By comparing notes, the astronomers learned the images taken more than two decades apart documented the expansion of debris from the star's explosion. The images taken in 2007 were about 16 percent larger than the ones taken in 1985. "This is a huge difference," said Reynolds. "It means the explosion debris is expanding very quickly, which in turn means the object is much younger than we originally thought." Reynolds also observed the object with the VLA radio telescope to confirm the supernova remnant's rapid expansion. Unlike visible-light telescopes, radio and X-ray telescopes can penetrate the thick clouds of gas and dust in our galaxy.
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POPSSupermassive black hole says sayonara "In their study, Stefanie Komossa and her colleagues at the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, examined the spectrum of light from a quasar, a brilliant beacon with the unwieldy name SDSS J092712.65+294344.0. Quasars, which lie at the center of galaxies, are fueled by black holes. An analysis of the quasar spectrum reveals a pattern of light emission that matches that expected from a supermassive black hole shot out of the galaxy’s center, the team reports in the May 10 Astrophysical Journal Letters."
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POPSGas 'finger' points to grim future I think the title means a grim future for the Magellanic Cloud, but it will be in the distant future. Perhaps rather than trying to travel to the stars, we can just wait until the stars travel to us
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POPSStudy:Alien Worlds Have Dry Atmospheres Scientists have found 213 planets outside our solar system, but only 14 have orbits that make it possible for this type of study; only eight or nine of those are close enough to see. Grillmair's team studied the closest, which goes by the catch name HD 189733b. But for the question: Where did water go?: Maybe it's hiding, scientists suggest. The water could be under dust clouds, or all the airborne water molecules have the same temperature, making it impossible to see using an infrared spectrograph. Or maybe it is just not there and astronomers have to go back to the drawing board when it comes to these alien planets. The other finding on the more distant of the two planets seems to indicate that the atmosphere is full of silicon-oxygen compounds, said study lead author L. Jeremy Richardson of NASA's Goddard Space Flight Center.
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