http://www.freerepublic.com/tag/astronomers/ en-us Mon, 6 Oct 2008 23:12:13 GMT Focus Forum 15 http://www.freerepublic.com/focus/f-chat/2099053/posts Planets circle the stars that dot the heavens. Before 1995, we couldn’t have said that with any certainty. Now we know of more than 300 planets orbiting distant stars, and we have a fleet of telescopes looking for them. The ultimate goal is to find another Earth orbiting a star like the Sun, but the quest on the way to that Holy Grail has yielded some strange benchmarks. CoRoT-exo3b, a dense planet orbiting another star COROT-exo-3b compared to Jupiter Meet the planet COROT-exo-3b. It orbits a star slightly larger, hotter, and brighter than the Sun. The star is not an... Bad Astronomy http://www.freerepublic.com/focus/f-chat/2099053/posts#comment Mon, 6 Oct 2008 23:12:13 GMT http://www.freerepublic.com/focus/f-chat/2063873/posts Orbit of solar system object SQ372 (blue) compared with the orbits of Neptune Pluto and Sedna (white, green, red). Credit: N. Kaib. Astronomers announced today that a new "minor planet" with an unusual orbit has been found just two billion miles from Earth, closer than Neptune. Using the Sloan Digital Sky Survey, astronomers detected a small, comet-like object called 2006 SQ372, which is likely made of rock and ice. However, its orbit never brings it close enough to the sun for it to develop a tail. Its unusual orbit is an ellipse that is four times longer than it... Universe Today http://www.freerepublic.com/focus/f-chat/2063873/posts#comment Mon, 18 Aug 2008 19:16:43 GMT http://www.freerepublic.com/focus/f-chat/2031865/posts NANTES, France (AFP) - European scientists on Monday said they had located five 'super-Earths', each of them between four and 30 times bigger than our planet, in a trio of distant solar systems. The discovery suggests that at least one third of stars similar to our own Sun host these difficult-to-detect celestial bodies, multiplying previous estimates by five. It also brings astronomers closer to finding planets outside our solar system, called exoplanets, that could potentially duplicate the conditions that gave rise to life on Earth. "In a year or two, it is likely that we will find habitable planets circling... AFP on Yahoo http://www.freerepublic.com/focus/f-chat/2031865/posts#comment Mon, 16 Jun 2008 17:57:17 GMT http://www.freerepublic.com/focus/f-news/2029083/posts ESA's orbiting X-ray observatory XMM-Newton has re-discovered an ignored celestial gem. The object in question is one of the youngest and brightest supernova remnants in the Milky Way, the corpse of a star that exploded around 1000 years ago. Its shape, age and chemical composition will allow astronomers to better understand the violent ways in which stars end their lives. Exploding stars seed the Universe with heavy chemical elements necessary to build planets and create life. The expanding cloud of debris that each explosion leaves behind, known as a supernova remnant (SNR), is a bright source of X-rays and radio... Science Centric http://www.freerepublic.com/focus/f-news/2029083/posts#comment Tue, 10 Jun 2008 22:03:34 GMT http://www.freerepublic.com/focus/f-chat/2016698/posts WASHINGTON (Reuters) - Astronomers are baffled after finding an exotic type of star called a pulsar apparently locked in an elongated orbit around a star much like the sun -- an arrangement defying what had been known about such objects. The rapidly spinning pulsar -- an extraordinarily dense object created when a massive star exploded as a supernova -- is called J1903+0327 and is located about 21,000 light years from Earth, the astronomers said. A light year is about 6 trillion miles, the distance light travels in a year. "The big question is -- how in the heck did this... Reuters on Yahoo http://www.freerepublic.com/focus/f-chat/2016698/posts#comment Fri, 16 May 2008 04:00:18 GMT http://www.freerepublic.com/focus/f-news/1982640/posts Astronomers Capture Rare Video Of Meteor Falling To Earth; Hunt For Meteorite ScienceDaily (Mar. 8, 2008) — Astronomers from The University of Western Ontario in London, Ontario, have captured rare video of a meteor falling to Earth. The Physics and Astronomy Department at Western has a network of all-sky cameras in Southern Ontario that scan the sky monitoring for meteors. Associate Professor Peter Brown, who specializes in the study of meteors and meteorites, says that Wednesday evening (March 5) at 10:59 p.m. EST these cameras captured video of a large fireball and the department has also received a number of... Science Daily http://www.freerepublic.com/focus/f-news/1982640/posts#comment Sat, 8 Mar 2008 23:07:17 GMT http://www.freerepublic.com/focus/f-news/1947988/posts Airborne astronomers to track intense meteor shower 16:59 03 January 2008 NewScientist.com news service Stephen Battersby The most intense meteor shower of the year hits Earth tonight. If the skies are clear and you live at high northern latitudes, then you could see dozens of Quadrantid meteors streaking over the pole. Or you might spot a plane full of astronomers racing northward, trying to find out how this unusual meteor shower was created, and whether it is the shrapnel of a celestial explosion witnessed in the 15th century. Like other meteor showers, the Quadrantids appear when Earth moves through an... New Scientist http://www.freerepublic.com/focus/f-news/1947988/posts#comment Fri, 4 Jan 2008 00:58:10 GMT http://www.freerepublic.com/focus/f-news/1943346/posts Alien astronomers could discern Earth's features 14:58 21 December 2007 NewScientist.com news service Stephen Battersby Aliens spying on us from another star system might be able to discern continents and oceans on our planet, using technology barely more advanced than our own. In imaginary form, these inquisitive extraterrestrials have been helping astronomers work out how much detail the next generation of space telescopes could reveal on Earth-like planets orbiting other stars. Seeing any detail at all is a tough task. Even at the distance of the nearest stars, only a few light years away, terrestrial planets would appear so small... New Scientist http://www.freerepublic.com/focus/f-news/1943346/posts#comment Sat, 22 Dec 2007 23:13:38 GMT http://www.freerepublic.com/focus/f-chat/1925925/posts WASHINGTON (Reuters) - Small, rocky planets that could resemble the Earth or Mars may be forming around a star in the Pleiades star cluster, astronomers reported on Wednesday. One of the stars in the cluster, also known as the Seven Sisters, is surrounded by an extraordinary number of hot dust particles that could be the "building blocks of planets" said Inseok Song, a staff scientist at NASA's Spitzer Science Center at the California Institute of Technology. "This is the first clear evidence for planet formation in the Pleiades, and the results we are presenting may well be the first observational... Reuters on Yahoo http://www.freerepublic.com/focus/f-chat/1925925/posts#comment Thu, 15 Nov 2007 02:36:43 GMT http://www.freerepublic.com/focus/f-news/1885713/posts WASHINGTON - Astronomers have stumbled upon a tremendous hole in the universe. That's got them scratching their heads about what's just not there. The cosmic blank spot has no stray stars, no galaxies, no sucking black holes, not even mysterious dark matter. It is 1 billion light years across of nothing. That's an expanse of nearly 6 billion trillion miles of emptiness, a University of Minnesota team announced Thursday. Astronomers have known for many years that there are patches in the universe where nobody's home. In fact, one such place is practically a neighbor, a mere 2 million light years... AP on Yahoo http://www.freerepublic.com/focus/f-news/1885713/posts#comment Fri, 24 Aug 2007 02:36:01 GMT http://www.freerepublic.com/focus/f-news/1863830/posts Astronomers have found evidence for the most distant galaxies ever detected. The galaxies are seen as they existed just 500 million years after the birth of the universe. Their light, traversing the cosmos for more than 13 billion years, was seen only because it was distorted in a natural "gravitational lens" created by the gravity-bending mass of a nearer cluster of galaxies. "Gravitational lensing is the magnification of distant sources by foreground structures," explained Caltech astronomer Richard Ellis, who led the international team. "By looking through carefully selected clusters, we have located six star-forming galaxies seen at unprecedented distances, corresponding... Space.com on Yahoo http://www.freerepublic.com/focus/f-news/1863830/posts#comment Tue, 10 Jul 2007 21:52:26 GMT http://www.freerepublic.com/focus/f-chat/1841525/posts HONOLULU — Astronomers have discovered 28 new planets outside of our solar system, increasing to 236 the number of known exoplanets, revealing that planets can exist around a broad spectrum of stellar types, from tiny, dim stars to giants.An artist's concept of the Neptune-sized planet GJ436b (right) orbiting the M-class dwarf star Gliese 436 at a distance of 3 million miles. foxnews http://www.freerepublic.com/focus/f-chat/1841525/posts#comment Tue, 29 May 2007 18:57:52 GMT http://www.freerepublic.com/focus/f-news/1831137/posts BALTIMORE - The astronauts who will service the Hubble Space Telescope were greeted enthusiastically Wednesday by astronomers who had faced the loss of the orbiting observatory when NASA canceled their mission. The seven astronauts will be "doing as much as we can cram in" to the September 2008 servicing mission that will keep the Hubble alive, mission commander Scott Altman told a crowded auditorium at the Space Telescope Science Institute, which coordinates the use of the telescope. "We will do our absolute best to leave the telescope in the most phenomenal condition that it can be when we let go... AP on Yahoo http://www.freerepublic.com/focus/f-news/1831137/posts#comment Thu, 10 May 2007 04:43:51 GMT http://www.freerepublic.com/focus/f-chat/1818260/posts A speedy gas cloud has allowed astronomers to probe closer than ever before to a supermassive black hole, confirming ideas about how these formidable objects can generate vast quantities of X-rays and other radiation. The black hole is thought to lie at the heart of a galaxy called NGC 1365, around 60 million light years away. NGC 1365 is a relatively nearby example of a galaxy with an active nucleus – a small, intensely bright spot at its core. These active galactic nuclei are among the brightest objects in the universe. space.newscientist.com http://www.freerepublic.com/focus/f-chat/1818260/posts#comment Mon, 16 Apr 2007 18:11:24 GMT http://www.freerepublic.com/focus/f-news/1802622/posts TUCSON, Ariz. -- Swarms of astronomers are expected to pack major observatories in Arizona this weekend hoping to see a rare "occultation" as Pluto crosses in front of a star and blots out its light. Sunday morning's event is exciting for scientists because it will give them a better idea of the size and makeup of Pluto's atmosphere. In an occultation -- not an eclipse, mind you -- the nearer object blots out the light and is backlit. If there is no atmosphere, it will blink out almost instantly, said Don McCarthy of the University of Arizona's Steward Observatory. But... AP on Bakersfield Californian http://www.freerepublic.com/focus/f-news/1802622/posts#comment Sun, 18 Mar 2007 03:33:14 GMT http://www.freerepublic.com/focus/f-news/1788710/posts WASHINGTON - Scientists taking their first "sniffs of air" from planets outside our solar system are a bit baffled by what they didn't find: water. One of the more basic assumptions of astronomy is that the two distant, hot gaseous planets they examined must contain water in their atmospheres. The two suns the planets orbit closely have hydrogen and oxygen, the stable building blocks of water. These planets' atmospheres — examined for the first time using light spectra to determine the air's chemical composition — are supposed to be made up of the same thing, good old H2O. But when... AP on Yahoo http://www.freerepublic.com/focus/f-news/1788710/posts#comment Wed, 21 Feb 2007 19:40:53 GMT http://www.freerepublic.com/focus/f-chat/1701441/posts WASHINGTON - The largest planet ever found orbiting another star is so puffy it would float on water, astronomers said Thursday. The newly discovered planet, dubbed HAT-P-1, is both the largest and least dense of the nearly 200 worlds astronomers have found outside our own solar system. HAT-P-1 orbits one of a pair of stars in the constellation Lacerta, about 450 light-years from Earth. "This new planet, if you could imagine putting it in a cosmic water glass, it would float," said Robert Noyes, a research astrophysicist with the Smithsonian Astrophysical Observatory. HAT-P-1 is an oddball planet, since it orbits... AP on Yahoo http://www.freerepublic.com/focus/f-chat/1701441/posts#comment Thu, 14 Sep 2006 16:59:07 GMT http://www.freerepublic.com/focus/f-chat/1611101/posts Climate changes such as global warming may be due to changes in the sun rather than to the release of greenhouse gases on Earth. Climatologists and astronomers speaking at the American Association for the Advancement of Science meeting in Philadelphia say the present warming may be unusual - but a mini ice age could soon follow. The sun provides all the energy that drives our climate, but it is not the constant star it might seem. Careful studies over the last 20 years show that its overall brightness and energy output increases slightly as sunspot activity rises to the peak... BBC News http://www.freerepublic.com/focus/f-chat/1611101/posts#comment Fri, 7 Apr 2006 19:09:17 GMT http://www.freerepublic.com/focus/f-news/1597858/posts Scientists announced today new evidence supporting the theory that the infant universe expanded from subatomic to astronomical size in a fraction of a second after its birth. The finding is based on new results from NASA's Wilkinson Microwave Anisotropy Probe (WMAP) satellite, launched in 2001 to measure the temperature of radiant heat left over from the Big Bang, which is the theoretical beginning to the universe. This radiation is known as the Cosmic Microwave Background (CMB), and it is the oldest light in the universe. Using WMAP data, researchers announced in 2003 that they had pieced together a very detailed... LiveScience.com on yahoo http://www.freerepublic.com/focus/f-news/1597858/posts#comment Fri, 17 Mar 2006 02:35:03 GMT http://www.freerepublic.com/focus/f-news/1579511/posts A newfound type of rotating stars played peek-a-boo with astronomers, appearing and disappearing a few times each day. The stars seem to act like faulty cosmic lighthouses, spinning and emitting brief and bright flashes of radio waves that are among the brightest objects in the sky, then disappearing from the heavens entirely. The discovery is detailed in the Feb. 16 issue of the journal Nature. An international team of researchers spotted the new stars, called rotating radio transients, or RRATs, using the Parkes radio telescope in Australia. They were searching for radio pulsars—rotating neutron stars emitting radiation—at the time, but... Space.com http://www.freerepublic.com/focus/f-news/1579511/posts#comment Thu, 16 Feb 2006 05:48:05 GMT http://www.freerepublic.com/focus/f-news/1547273/posts TUCSON, Ariz. - Astronomers using NASA's Spitzer Space Telescope have discovered a perfectly decorated Christmas tree 2,500 light years from earth. Scientists at the University of Arizona's Steward Observatory said the remarkable star cluster gives them the first glimpse of newborn stars acting just as predicted - patterned geometrically and spaced according to density, temperature and gravity. "If you look at the very young stars in the cluster and the spacing between them, it isn't random spacing," said Erick T. Young, an astronomer at the Steward Observatory. "They're all about the same distance apart." The stars are less than 100,000... AP on Yahoo http://www.freerepublic.com/focus/f-news/1547273/posts#comment Mon, 26 Dec 2005 20:44:46 GMT http://www.freerepublic.com/focus/f-news/1530909/posts LOS ANGELES – Astronomers peering through ground- and space-based telescopes have discovered what they believe is the birth of the smallest known solar system. Scientists found a tiny brown dwarf – or failed star – less than one hundredth the mass of the sun surrounded by what appears to be a disk of dust and gas. The brown dwarf – located 500 light years away in the constellation Chamaeleon – appears to be undergoing a planet-forming process that could one day yield a miniature solar system, said Kevin Luhman of Penn State University, who led the discovery. It's long believed... ap on San Diego Union Tribune http://www.freerepublic.com/focus/f-news/1530909/posts#comment Wed, 30 Nov 2005 02:20:23 GMT http://www.freerepublic.com/focus/f-news/1483315/posts WASHINGTON (Reuters) - Astronomers said on Monday they have detected a cosmic explosion at the very edge of the visible universe, a 13-billion-year-old blast that could help them learn more about the earliest stars. The brilliant blast -- known as a gamma ray burst -- was probably caused by the death of a massive star soon after the Big Bang, but was glimpsed on September 4 by NASA's new Swift satellite and later by ground-based telescopes. The explosion occurred soon after the first stars and galaxies formed, perhaps 500 million to 1 billion years after the Big Bang explosion that... Reuters on yahoo http://www.freerepublic.com/focus/f-news/1483315/posts#comment Tue, 13 Sep 2005 04:57:03 GMT http://www.freerepublic.com/focus/f-news/1413436/posts WASHINGTON (Reuters) - The Andromeda galaxy just got bigger -- three times bigger, astronomers said on Monday. The galaxy is not actually expanding. But new measurements suggest that the nearest galaxy to our own Milky Way is three times broader than astronomers had thought. They now believe a thin sprinkling of stars once thought to be a halo is in fact part of Andromeda's main disk. That makes the spiral galaxy, so close to Earth that it appeared as a fuzzy blob to the ancients, more than 220,000 light-years across -- triple the previous estimate of 70,000 to 80,000 light-years.... Reuters on Yahoo http://www.freerepublic.com/focus/f-news/1413436/posts#comment Tue, 31 May 2005 01:23:52 GMT http://www.freerepublic.com/focus/f-news/1339189/posts An outcast star is zooming out of the Milky Way, the first ever seen escaping the galaxy, astronomers reported on Tuesday. The star is heading for the emptiness of intergalactic space after being ejected from the heart of the Milky Way following a close encounter with a black hole, said Warren Brown, an astronomer at the Harvard-Smithsonian Center for Astrophysics. The outcast is going so fast -- over 1.5 million mph -- that astronomers believe it was lobbed out of the galaxy by the tremendous force of a black hole thought to sit at the Milky Way's center. That speed... Reuters http://www.freerepublic.com/focus/f-news/1339189/posts#comment Wed, 9 Feb 2005 06:16:16 GMT