Latest Brown dwarf Stories

2007-04-18 14:15:03

A study of brown dwarfs has revealed that these "failed stars" can possess powerful magnetic fields and emit lighthouse beams of radio waves thousands of times brighter than any detected from the Sun. The brown dwarfs are behaving like pulsars, one of the most exotic types of object in our Universe. Gregg Hallinan of the National University of Ireland, Galway, who is presenting the discovery at the RAS National Astronomy Meeting in Preston on 18th April, said, "Brown dwarfs tend to be seen as...

2007-01-15 10:50:00

A recent study found 20 new star systems in the sun's local neighborhood. Most of the new discoveries are red dwarfs, much smaller and dimmer than the sun. Yet scientists are growing more confident that these stars could host habitable planets. NASA - Ancient astronomers logically focused their efforts on the brightest stars, the ones they could see in the night sky. Many modern astronomers, aided by ever-more-sensitive telescopes, have investigated objects that are unimaginably distant and...

2006-10-13 22:05:00

Engineers are rolling up their sleeves in preparation for building a telescope that will find the nearest star-like objects and the brightest galaxies. NASA has approved the start of construction on a new mission called the Wide-field Infrared Survey Explorer, which will scan the entire sky in infrared light. "There's a whole infrared sky out there full of surprises," said Dr. Edward Wright, principal investigator for the mission at the University of California, Los Angeles. "By surveying the...

2006-01-11 09:30:00

NASA -- In one of the most detailed astronomical images ever produced, NASA's Hubble Space Telescope captured an unprecedented look at the Orion Nebula. This turbulent star formation region is one of astronomy's most dramatic and photogenic celestial objects. "Orion is a bustling cauldron of activity. This new large-scale Hubble image of the region reveals a treasure-house of beauty and astonishing detail for comprehensive scientific study," said Jennifer Wiseman, NASA's Hubble program...

2006-01-11 07:25:00

NOAO -- New Spitzer Space Telescope observations of an unusual class of interacting binary stars detected excess amounts of infrared radiation, suggesting that these odd objects are surrounded by large disks of cool dust. The results reported today in Washington, DC, at the 207th meeting of the American Astronomical Society (AAS) were produced by one of six teams of professional astronomers and high school teachers participating in a unique program co-sponsored by the Spitzer Science Center...

2005-10-25 19:30:00

Thus, the process of building planets is more universal and robust than had previously been assumed (Science Express, October 20, 2005). Brown dwarfs, like more massive normal stars, are formed when interstellar gas and dust clouds collapse. When this happens, a central, dense area builds up, embedded in a rotating disc made of gas and dust. These circumstellar discs produce infrared radiation according to their temperature. The collapse of gas and dust clouds ends when the increasing...

2005-10-21 00:55:00

JPL -- NASA's Spitzer Space Telescope has spotted the very beginnings of what might become planets around the puniest of celestial orbs -- brown dwarfs, or "failed stars." The telescope's infrared eyes have for the first time detected clumps of microscopic dust grains and tiny crystals orbiting five brown dwarfs. These clumps and crystals are thought to collide and further lump together to eventually make planets. Similar materials are seen in planet-forming regions around stars and in...

2005-10-04 09:52:43

Cambridge, MA -- In an exercise that demonstrates the power of a multiwavelength investigation using diverse facilities, astronomers at the Harvard-Smithsonian Center for Astrophysics (CfA) have deciphered the true nature of a mysterious object hiding inside a dark cosmic cloud. They found that the cloud, once thought to be featureless, contains a baby star, or possibly a failed star known as a "brown dwarf," that is still forming within its dusty cocoon. Observations indicate that the...

2005-09-09 18:35:00

Astronomers have glimpsed dusty debris around an essentially dead star where gravity and radiation should have long ago removed any sign of dust -- a discovery that may provide insights into our own solar system's eventual demise several billion years from now. The results are based on mid-infrared observations made with the Gemini 8-meter Frederick C. Gillett Telescope (Gemini North) on Hawaii's Mauna Kea. The Gemini observations reveal a surprisingly high abundance of dust orbiting an...

2005-06-09 19:06:18

British scientists have opened a new window on the Universe with the recent commissioning of the Visitor Instrument ULTRACAM on the European Southern Observatory's (ESO) Very Large Telescope (VLT) in Chile. ULTRACAM is an ultra fast camera capable of capturing some of the most rapid astronomical events. It can take up to 500 pictures a second in three different colours simultaneously. It has been designed and built by scientists from the Universities of Sheffield and Warwick (United...

Word of the Day
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.