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Keyword: browndwarf

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  • Scientists may have found Planet X, the mysterious presence that has eluded astronomers

    12/12/2015 1:40:04 AM PST · by Squawk 8888 · 66 replies
    National Post ^ | December 11, 2015 | Sarah Kaplan
    It’s a big, dark presence at the farthest reaches of our solar system, a mysterious force powerful enough to skew the paths of planets in orbit and yet so subtle that it slips undetected past even the most powerful telescopes on Earth. For centuries, it has eluded some of the most brilliant minds in astronomy — some say it even destroyed one. It’s the subject of endless calculations and rampant speculation, crackpot theories and countless hours spent gazing, fruitlessly, at the night sky. It’s known as Planet X. And on Tuesday, a group of astronomers said they’d found not just...
  • Star Blasted Through Solar System 70,000 Years Ago

    02/18/2015 1:11:46 PM PST · by BenLurkin · 113 replies ^ | Ian O'Neill
    Highlighted by astronomers at the University of Rochester and the European Southern Observatory, the star nicknamed Scholzs star has a very low tangential velocity in the sky, but it has been clocked traveling at a breakneck speed away from us. In other words, from our perspective, Scholzs star is fleeing the scene of a collision with us. Most stars this nearby show much larger tangential motion, said Eric Mamajek, of the University of Rochester. The small tangential motion and proximity initially indicated that the star was most likely either moving towards a future close encounter with the solar...
  • Its Freezing on the Surface of this Nearby Star-like Object Read more:

    04/29/2014 1:34:18 PM PDT · by BenLurkin · 26 replies ^ | April 29, 2014 | Shannon Hall on
    A brown dwarf thats as frosty as the Earths North Pole has been discovered lurking incredibly close to our Solar System. Astronomer Keven Luhman from Pennsylvania State University used NASAs Wide-field Infrared Survey Explorer (WISE) and the Spitzer Space Telescope to pinpoint the objects temperature and distance. This is the coldest brown dwarf found so far, and its a mere 7.2 light-years away, making it the seventh closest star-like object to the Sun. It is very exciting to discover a new neighbor of our Solar System that is so close, said Luhman in a press release. Brown dwarfs emerge when...
  • New Planet Found in Our Solar System?

    05/12/2012 3:44:38 AM PDT · by LibWhacker · 42 replies
    National Geographic ^ | 5/11/12 | Richard A. Lovett
    Odd orbits of remote objects hint at unseen world, new calculations suggest. An as yet undiscovered planet might be orbiting at the dark fringes of the solar system, according to new research.Too far out to be easily spotted by telescopes, the potential unseen planet appears to be making its presence felt by disturbing the orbits of so-called Kuiper belt objects, said Rodney Gomes, an astronomer at the National Observatory of Brazil in Rio de Janeiro. Kuiper belt objects are small icy bodiesincluding some dwarf planetsthat lie beyond the orbit of Neptune. Once considered the ninth planet in our system, the...
  • Astronomy Picture of the Day -- The Coldest Brown Dwarf

    08/30/2011 3:08:12 AM PDT · by SunkenCiv · 24 replies · 1+ views
    NASA ^ | August 30, 2011 | (see photo credit)
    Explanation: This cosmic snapshot composed with image data from NASA's Wide-field Infrared Survey Explorer (WISE) satellite captures a multitude of faint stars and distant galaxies toward the constellation Lyra at wavelengths longer than visible light. But the object circled at the center is not quite a star. Cataloged as WISE 1828+2650, it lies within 40 light-years of the Sun and is currently the coldest brown dwarf known. A brown dwarf begins like a star, with the gravitational collapse of a dense cloud of gas and dust, but is not massive enough to achieve the core temperatures and densities that trigger...
  • Object Survives Being Swallowed by a Star

    08/03/2006 10:40:47 AM PDT · by NormsRevenge · 16 replies · 421+ views on Yahoo ^ | 8/3/06 | Ker Than
    Long before the Bible's tale of Jonah being swallowed by a whale, a small wannabe star has emerged intact after being engulfed by a neighboring giant star, scientists say. The victim was a brown dwarf, a failed star too small to sustain the nuclear reactions that ignites regular stars. The purpetrator was a red giant, an ancient star that once resembled our Sun but which puffed up to enormous size after its hydrogen fuel was depleted. The red giant has since expelled most of its gas into space and transformed into a dense, Earth-sized star called a white dwarfs. Using...
  • Astronomers discover possible miniature solar system

    11/29/2005 6:20:23 PM PST · by NormsRevenge · 32 replies · 1,052+ views
    ap on San Diego Union Tribune ^ | 11/29/05 | AP - Los Angeles
    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...
  • First direct sighting of an extrasolar planet

    01/12/2005 7:07:27 AM PST · by Momaw Nadon · 56 replies · 1,910+ views news service ^ | Tuesday, January 11, 2005 | Maggie McKee
    Astronomers have directly observed an extrasolar planet for the first time, but are at a loss to explain what they see. More than 130 planets have been detected orbiting stars other than our own, the Sun. But because the stars far outshine the planets, all of the planets were detected indirectly - by how much they made their host stars wobble or dim, for example. Now, astronomers say they are almost certain they have snapped an actual image of an extrasolar planet. It was first seen at infrared wavelengths with the Very Large Telescope in Chile in April 2004, and...
  • Three-star system ejects weakest link

    01/16/2003 12:01:01 PM PST · by theFIRMbss · 5 replies · 145+ views
    USA TODAY (via Yahoo! news) ^ | Thu Jan 9, 7:59 AM ET | Dan Vergano
    Three-star system ejects weakest link Thu Jan 9, 7:59 AM ET Dan Vergano USA TODAY SEATTLE -- Astronomers report a first sighting of a round of Survivor set in space -- a weakling brown dwarf star being booted out of a triple-star solar system. Brown dwarfs are ''failed'' stars with relatively low mass. They are huge, but they lack the heft needed to light up with the nuclear fusion that powers true stars. Numerous brown dwarfs have been spotted in recent decades, even in regions of space not associated with star formation. Seeing one ejected from a solar system suggests...
  • Weather In Outer Space? Ask A Brown Dwarf

    08/02/2002 4:48:12 PM PDT · by vannrox · 14 replies · 483+ views
    ScienceDaily Magazine ^ | Thursday, July 25, 2002 | Editorial Staff
    Reprinted from ScienceDaily Magazine ...Source:Washington University In St. Louis Date Posted:Thursday, July 25, 2002Web Address: Weather In Outer Space? Ask A Brown Dwarf Until recently, "How's the weather up there?" was a question for pilots, NBA stars and friendly giants. Today, however, you might also ask a dwarf. A brown dwarf, that is. Brown dwarfs, which have been described as "failed stars," are celestial bodies more massive than planets like Jupiter but not large enough to sustain the thermonuclear reactions that make a star shine. In the June 1, 2002 issue of Astrophysical Journal Letters, Katharina Lodders, a senior research...