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Latest Brown dwarf Stories

8dfac4626a50ea3a567eadfd58642cdf1
2011-03-10 08:45:00

Cardiff University astronomers believe that a young star's long "napping" could trigger the formation of a second generation of smaller stars and planets orbiting around it. It has long been suspected that the buildup of material onto young stars is not continuous but happens in episodic events, resulting in short outbursts of energy from these stars. However, this has been largely ignored in models of star formation. Now, by developing advanced computer models to simulate the behavior of...

6947767fe834b6a648ba7b54edec0e051
2011-02-24 10:13:59

Astronomers may have found the first object clearing its path in the natal disc surrounding a young star Using ESO's Very Large Telescope an international team of astronomers has been able to study the short-lived disc of material around a young star that is in the early stages of making a planetary system. For the first time a smaller companion could be detected that may be the cause of the large gap found in the disc. Future observations will determine whether this companion is a planet or...

8e24d75ae0dbfabcc12bac03d1ece8591
2011-02-21 07:09:47

Background In November 2010, the scientific journal Icarus published a paper by astrophysicists John Matese and Daniel Whitmire, who proposed the existence of a binary companion to our sun, larger than Jupiter, in the long-hypothesized "Oort cloud" -- a faraway repository of small icy bodies at the edge of our solar system. The researchers use the name "Tyche" for the hypothetical planet. Their paper argues that evidence for the planet would have been recorded by the Wide-field Infrared...

c9a778986365f281031ebbcb36b4c5c5
2011-01-10 13:30:00

A deep survey of more than 200,000 stars in our Milky Way galaxy has unveiled the sometimes petulant behavior of tiny red dwarf stars. These stars, which are smaller than the Sun, can unleash powerful eruptions called flares that may release the energy of more than 100 million atomic bombs. Red dwarfs are the most abundant stars in our universe and are presumably hosts to numerous planets. However, their erratic behavior could make life unpleasant, if not impossible, for many alien worlds....

ec2deccb84daf7570314386baf82f8cb1
2010-11-10 06:40:00

NASA's Wide-field Infrared Survey Explorer, or WISE, has eyed its first cool brown dwarf: a tiny, ultra-cold star floating all alone in space. WISE is scanning the whole sky in infrared light, picking up the glow of not just brown dwarfs but also asteroids, stars and galaxies. It has sent millions of images down to Earth, in which infrared light of different wavelengths is color-coded in the images. "The brown dwarfs jump out at you like big, fat, green emeralds," said Amy Mainzer, the deputy...

e18142c2973699071064a32def24f1ab
2010-10-05 07:35:00

 Although WISE has 'warmed up,' NASA has decided the mission will still continue. WISE will now focus on our nearest neighbors -- the asteroids and comets traveling together with our solar system's planets around the sun. "Two of our four infrared detectors still work even at warmer temperatures, so we can use those bands to continue our hunt for asteroids and comets," said Amy Mainzer of NASA's Jet Propulsion Laboratory in Pasadena, Calif. Mainzer is the principal investigator of the...

1ada921b12071e09dd0d50fb4fb69ead1
2010-07-30 07:08:45

The discovery is expected to shed light on the early stages of solar system formation. Astronomers have imaged a very young brown dwarf, or failed star, in a tight orbit around a young nearby sun-like star. An international team led by University of Hawaii astronomers Beth Biller and Michael Liu with help from University of Arizona astronomer Laird Close and UA graduate students Eric Nielsen, Jared Males and Andy Skemer made the rare find using the Near-Infrared Coronagraphic Imager, or NICI,...

83cf61110a2849c0a692bfd6b4f456bd1
2010-07-21 06:50:00

Using a combination of instruments on ESO's Very Large Telescope, a UK-led international team of astronomers have discovered the most massive stars to date, one which at birth had more than 300 times the mass of the Sun, twice as much as the currently accepted limit. The existence of these monsters "” millions of times more luminous than the Sun, losing mass through very powerful winds "” may provide an answer to the question "how massive can stars be?" The new results appear in a...

e901ef3a1b07eac81dc9efe9c241173c1
2010-04-21 12:25:00

PASADENA, Calif. -- NASA's Spitzer Space Telescope has discovered something odd about a distant planet -- it lacks methane, an ingredient common to many of the planets in our solar system. "It's a big puzzle," said Kevin Stevenson, a planetary sciences graduate student at the University of Central Florida in Orlando, lead author of a study appearing tomorrow, April 22 in the journal Nature. "Models tell us that the carbon in this planet should be in the form of methane. Theorists are going...

7301f18a689c05633ebbe1a68be8f2111
2010-01-29 11:00:00

An international team, led by astronomers at the University of Hertfordshire have discovered what may be the coolest sub-stellar body ever found outside our own solar system. Using the United Kingdom Infrared Telescope (UKIRT) in Hawaii, a discovery has been made of an object which is technically known as a brown dwarf. The team's findings have been accepted for publication in the journal Monthly Notices of the Royal Astronomical Society. What has excited astronomers are its very peculiar...


Word of the Day
mallemaroking
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.