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Latest Circumstellar disk Stories

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2008-01-07 00:00:00

Washington, DC -- Astronomers at the Carnegie Institution have found the first indications of highly complex organic molecules in the disk of red dust surrounding a distant star. The eight-million-year-old star, known as HR 4796A, is inferred to be in the late stages of planet formation, suggesting that the basic building blocks of life may be common in planetary systems. In a study published in the current Astrophysical Journal Letters, John Debes and Alycia Weinberger of the Carnegie...

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2007-01-07 15:47:23

New observations from NASA's Hubble Space Telescope have begun to fill gaps in the early stages of planet birth. Hubble observed a "blizzard" of particles in a disk around a young star revealing the process by which planets grow from tiny dust grains. The particles are as fluffy as snowflakes and are roughly ten times larger than typical interstellar dust grains. They were detected in a disk encircling the 12-million-year-old star AU Microscopii. The star is 32 light-years away in the...

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2006-06-27 14:30:00

NASA's Hubble Space Telescope has revealed not one but two dust disks circling the nearby star Beta Pictoris. The images confirm a decade of scientific speculation that a warp in the young star's dust disk may actually be a second inclined disk, which is evidence for the possibility of at least one Jupiter-size planet orbiting the star. The disk is fainter than the star because, at the visible wavelengths measured, its dust only reflects light. To see the faint disk, astronomers used Hubble's...

2006-04-05 13:25:00

By Deborah Zabarenko WASHINGTON -- Planets outside our solar system might form, phoenix-like, out of the debris circling a dead star known as a pulsar, researchers reported on Wednesday after finding the makings for a planet near such a body. This could mean that planet-formation could be more common than previously thought, said Deepto Chakrabarty of the Massachusetts Institute of Technology. "What's remarkable here is this process of planet formation, which we associate with the birth of...

2006-04-05 12:40:00

By Deborah Zabarenko WASHINGTON (Reuters) - Planets outside our solar system might form, phoenix-like, out of the debris circling a dead star known as a pulsar, researchers reported on Wednesday after finding the makings for a planet near such a body. This could mean that planet-formation could be more common than previously thought, said Deepto Chakrabarty of the Massachusetts Institute of Technology. "What's remarkable here is this process of planet formation, which we associate with the...

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...

e63eada1e842f9efeddcf8a8705b804f1
2005-09-20 16:17:01

Cambridge, MA -- Newborn stars are difficult to photograph. They tend to hide in the nebulous stellar nurseries where they formed, enshrouded by thick layers of dust. Now, Smithsonian astronomer T.K. Sridharan (Harvard-Smithsonian Center for Astrophysics) and his colleagues have photographed a pair of stellar twins in infrared light, which penetrates the dust. And these babies are whoppers, weighing several times the mass of the Sun. Moreover, Sridharan's images reveal a circumstellar disk...

2005-09-09 18:43:10

Using NASA's Spitzer Space Telescope, a team of astronomers led by the University of Rochester has detected gaps ringing the dusty disks around two very young stars, which suggests that gas-giant planets have formed there. A year ago, these same researchers found evidence of the first "baby planet" around a young star, challenging most astrophysicists's models of giant-planet formation. The new findings in the Sept. 10 issue of Astrophysical Journal Letters not only reinforce the idea that...

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2005-07-21 07:42:14

Gemini -- A relatively young star located about 300 light-years away is greatly improving our understanding of the formation of Earth-like planets. The star, going by the unassuming name of BD +20 307, is shrouded by the dustiest environment ever seen so close to a Sun-like star well after its formation. The warm dust is believed to be from recent collisions of rocky bodies at distances from the star comparable to that of the Earth from the Sun. The results were based on observations...

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2004-11-26 06:11:22

ESO -- One of the currently hottest astrophysical topics - the hunt for Earth-like planets around other stars - has just received an important impetus from new spectral observations with the MIDI instrument at the ESO VLT Interferometer (VLTI). An international team of astronomers [2] has obtained unique infrared spectra of the dust in the innermost regions of the proto-planetary discs around three young stars - now in a state possibly very similar to that of our solar system in the making,...


Latest Circumstellar disk Reference Libraries

6_eb1c58e78fe764237148429a189b17e92
2004-10-19 04:45:42

Star Formation -- Star formation is the process by which gas in molecular clouds gets transformed into stars. In the current paradigm of star formation, cores of molecular clouds (regions of specially high density) became gravitationally unstable, and start to concentrate. Part of the gravitational energy lost in the process is radiated in the infrared, another part increases the temperature of the core. The accretion of material happen partially though a circumstellar disc. When...

4_2263b8f4e602bddd69c225b3bc2c46aa2
2004-10-19 04:45:41

Asteroid Belt -- The Asteroid belt is a region of the solar system falling roughly between the planets Mars and Jupiter where the greatest concentration of asteroid orbits can be found. It is believed that, during the first million years of the solar system history, planets formed by accretion of planetesimals. Ripetute collisions led to the familiar rocky planets and to the gas giant's cores. However, in this zone of the system the strong gravity of Jupiter inhibited the final stages...

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Word of the Day
lambent
  • Licking.
  • Hence Running along or over a surface, as if in the act of licking; flowing over or along; lapping or bathing; softly bright; gleaming.
This word comes the Latin 'lambere,' to lick.
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