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Latest Circumstellar disk Stories

Complex Outflow Structure Revealed In The Binary UY Aurigae
2014-05-21 03:43:00

National Astronomical Observatory of Japan An international team of astronomers, led by Dr. Tae-Soo Pyo (Subaru Telescope, NAOJ), has revealed a complicated outflow structure in the binary UY Aur (Aurigae). The team observed the binary using the Gemini North"s NIFS (Near-Infrared Integral Field Spectrometer) with the Altair adaptive optics system. The team found that the primary star has a wide, open outflow, while the secondary star has a well-collimated jet. Because many stars form...

Standard Model Does Little To Explain Why Earth Is So Dry
2012-07-18 10:59:10

Lawrence LeBlond for redOrbit.com - Your Universe Online Despite seventy percent of the Earth´s surface being covered by water, in reality the whole of the planet is only made up of 1 percent water, making it relatively dry compared to the gas giants, such as Jupiter and Neptune. And now, that dryness, which has long perplexed scientists, has been explained by a team of scientists working at the Space Telescope Science Institute (STSI) in Baltimore, Maryland. The standard model...

Planet-Forming Dust Abruptly Disappears Around Star
2012-07-05 05:10:33

Lee Rannals for redOrbit.com - Your Universe Online One star pinpointed as a prime location for a planet-forming disk decided enough was enough, and closed-up shop suddenly. While observing TYC 824126521, a young star located about 456 light years from Earth, researchers discovered that the planet-forming dust that once surrounded the star abruptly disappeared. Between 2008, when the star was being observed by a powerful infrared telescope in Chile, and 2010, when NASA's WISE...

Study Sheds Light On Planetary Orbital Pile-Ups
2012-03-20 08:32:57

Researchers said they have found why some orbits seen in young solar systems seem to be more popular than others. Astronomers have been puzzled as to why giant gas planets like Jupiter and Saturn appear to occupy certain regions in mature solar systems while staying clear of others. Ilaria Pascucci, an assistant professor at the University of Arizona's Lunar and Planetary Laboratory, said the final distribution of planets does not vary smoothly with distance from the star, but has clear...

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2010-11-13 07:55:00

By Dauna Coulter - Science @ NASA Did you know that the Earth has a dust tail? The Spitzer Space Telescope sailed right through it a few months ago, giving researchers a clear idea of what it looks like. That could be a big help to planet hunters trying to track down alien worlds. "Planets in distant solar systems probably have similar dust tails," says Spitzer project scientist Mike Werner. "And in some circumstances these dust features may be easier to see than the planets themselves. So...

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2010-02-22 12:05:00

How Do Planets Form? For centuries, astronomers and philosophers wondered how our solar system and its planets came to be. As telescopes advanced and space probes were sent out to explore, we learned more and more about our solar system, which gave us clues to how it might have taken shape. But were our ideas right? We could only see the end result of planet formation, not the process itself. And we had no other examples to study. Even with the knowledge gained about our solar system, we were...

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2009-09-25 06:10:00

Astronomers using the twin 10-meter telescopes at the W. M. Keck Observatory in Hawaii have explored one of the most compact dust disks ever resolved around another star. If placed in our own solar system, the disk would span about four times Earth's distance from the sun, reaching nearly to Jupiter's orbit. The compact inner disk is accompanied by an outer disk that extends hundreds of times farther. The centerpiece of the study is the Keck Interferometer Nuller (KIN), a device that combines...

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2009-07-01 08:04:49

Two University of Hawai'i at Mānoa astronomers have found a binary star-disk system in which each star is surrounded by the kind of dust disk that is frequently the precursor of a planetary system. Doctoral student Rita Mann and Dr. Jonathan Williams used the Submillimeter Array on Mauna Kea, Hawaii to make the observations. A binary star system consists of two stars bound together by gravity that orbit a common center of gravity. Most stars form as binaries, and if...

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2008-07-09 10:52:35

A detailed survey of stars in the Orion Nebula has found that fewer than 10 percent have enough surrounding dust to make Jupiter-sized planets, according to a report by astronomers at the University of California, Berkeley, the California Institute of Technology (Caltech) and the Harvard-Smithsonian Center for Astrophysics. Because stars like the sun probably formed in hot open clusters like Orion, the finding suggests that sun-like stars have a low probability of forming planets, or at...

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2008-03-26 13:40:00

Astrophysicists observe a circumstellar disk with telltale signs of planet formationScientists are one step closer to understanding how new planets form, thanks to research funded by the National Science Foundation (NSF) and carried out by a team of astrophysicists at the American Museum of Natural History.Ben R. Oppenheimer, assistant curator in the museum's Department of Astrophysics, and his colleagues have used the Lyot Project coronograph attached to a U.S. Air Force telescope on Maui,...


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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