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Latest Circumstellar discs Stories

The Path To Planet Formation
2012-11-28 11:36:08

April Flowers for redOrbit.com - Your Universe Online A new study, using the capabilities of the Subaru Telescope, has captured a clear image of the protoplanetary disk of the star UX Tau A. An international team of researchers from the National Astronomical Observatory of Japan (NAOJ) and the Japanese universities of Kobe, Hyogo, and Saitama released a detailed study of the disk's characteristics, suggesting that its dust particles are large in size and non-spherical in shape. The...

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2012-09-04 18:45:40

Lee Rannals for redOrbit.com [ Watch the Video: The Birth of a Planet Simulation ] Planetary researchers have a new tool in their artillery when trying to hunt for extrasolar planets. Scientists can now use simulated models developed by a group of scientists of how planets are born, helping the hunt for extrasolar planets. Planets generally form when a molecular cloud collapses into a young star. As the leftover gas and dust form a disk around the star, the particulates inside...

Sweet! Distant Star Surrounded By Sugar
2012-08-29 12:52:44

Watch the Video: Artist´s Impression of Glycolaldehyde Molecules | Watch the Video: Sugar Molecules Found in the Young Star Lee Rannals for redOrbit.com - Your Universe Online Most would assume that sugar is an essential part of life, but did you know it is actually considered a building block? Well, astronomers have now found these sweet organic molecules around a distant star. The finding reported in the Astrophysical Journal Letters proves that the building blocks of life...

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...

Small Planets Less Pickier For Host Stars Than Previously Thought
2012-06-14 14:22:29

Lee Rannals for redOrbit.com [ Watch the Video ] New observations show that small planets may be more widespread in our galaxy than previously thought. Lars A. Buchhave, an astrophysicist at the Niels Bohr Institute and the Centre for Star and Planet Formation at the University of Copenhagen, and colleagues studied the composition of over 150 stars harboring 226 planet candidates smaller than Neptune for the research. Scientists previously thought that the formation of small...

2012-06-13 14:32:55

Building a terrestrial planet requires raw materials that weren't available in the early history of the universe. The Big Bang filled space with hydrogen and helium. Chemical elements like silicon and oxygen - key components of rocks - had to be cooked up over time by stars. But how long did that take? How many of such heavy elements do you need to form planets? Previous studies have shown that Jupiter-sized gas giants tend to form around stars containing more heavy elements than the Sun....

Image 1 - Astronomers Use ALMA To Dissect Nearby Planetary System
2012-04-12 11:46:36

[ Watch the Video ] Astronomers have made a breakthrough discovery in understanding a nearby planetary system, giving clues about how these systems form and evolve. Scientists used the Atacama Large Millimeter/submillimeter Array (ALMA) to find that planets orbiting the star Fomalhaut must be smaller than originally thought. The high-resolution images show that both the inner and outer edges of the thin, dusty disk have very sharp edges.  This, as well as computer simulations,...

Comets Collide To Create Dust Belt
2012-04-12 04:45:20

The ESA´s Herschel Space Observatory has been studying the dust near the star Fomalhaut and has found the surrounding dust appears to have come from the dust of destroyed comets. A young star, Fomalhaut is estimated to be just a few million years old and twice as large as the sun. The dust belt near the star was discovered in the 1980s by the Infrared Astronomical Satellite (IRAS). Herschel's imaging technology and capabilities are able to capture a clearer picture of this dust belt,...

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...


Latest Circumstellar discs Reference Libraries

8_2c71772f2c3a31994d5208d4518632494
2004-10-19 04:45:44

Cosmogony -- Cosmogony is the study of the origins of celestial objects. It is most commonly used to refer to the study of the origin of the solar system. Currently, the most widely accepted theory is that the solar system was formed roughly 5 billion years ago with the collapse of a nebula of gas and dust, likely caused by shock waves generated by a nearby supernova. The solar system would have formed as a member of a star cluster, now long-since dispersed throughout the Milky Way over...

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...

3_a997defc9ca7ea81c6bd4ed4bab88e3c2
2004-10-19 04:45:40

Vega -- Vega (Alpha Lyrae) is the lead star in the constellation Lyra, reaching near directly overhead the mid-northern latitudes, during the summer. It's a "nearby star" at only 25 light years distant and together with Arcturus and Sirius, one of the brightest stars in the Sun's neighbourhood. Vega is a vertex of the Summer Triangle. Its spectral class is A0V (Sirius, an A1V, is slightly less powerful) and it's firmly in the main sequence, fusing hydrogen to helium in its core....

3_26342a6670b6131c97d5fc3f8796ebd92
2004-10-19 04:45:40

Epsilon Eridani -- Epsilon Eridani is a main-sequence star in the constellation of Eridanus (the river). It is often used in science fiction because it is extremely sunlike, and in the fictional Star Trek universe it is the home sun of the planet Vulcan which is home to Mr. Spock. It is the third closest star visible without a telescope. It has 85% of the Sun's mass, almost that much of its diameter, and 28% of its luminosity. It is 10.5 light years from Earth. Its spectrum is...

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Word of the Day
endocarp
  • The hard inner (usually woody) layer of the pericarp of some fruits (as peaches or plums or cherries or olives) that contains the seed.
This word comes from the Greek 'endon,' in, within, plus the Greek 'kardia,' heart.
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