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Latest Interstellar medium Stories

a62b1561322c4bb2361ac5e93de050b81
2006-07-13 17:20:00

Impressive set of APEX Results to be published in Special Issue of Astronomy & Astrophysics The Atacama Pathfinder Experiment (APEX) 12-m sub-millimetre telescope lives up to the ambitions of the scientists by providing access to the "Cold Universe" with unprecedented sensitivity and image quality. As a demonstration, no less than 26 articles based on early science with APEX are published this week in the research journal Astronomy & Astrophysics. Among the many new findings, most...

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2006-06-06 09:15:00

An international team of astronomers has discovered that the naked-eye star, tau Scorpii, unexpectedly hosts a complex network of magnetic field lines over its surface. Our Sun has its explosive flares and spots and high speed wind, but it is a placid star compared to some. Stars that are much more massive live fast and die young, with blue-white, intensely hot surfaces that emit energy at a rate millions of times greater than that of the Sun. These stars are so bright that their light alone...

2006-04-18 12:50:00

HONOLULU (AP) - Hawaii astronomers are analyzing data they gathered from the Sahara desert to find evidence of interstellar wind blowing through the solar system. Six University of Hawaii scientists traveled to Libya to view the sun's outer corona for four minutes and six seconds during a total eclipse March 29. They used specialized imaging cameras and an infrared spectrograph to look at the sun's outer corona, which is only visible during a total solar eclipse. Temperatures on the sun are...

1ac28f57fe97a147274f15f2dfb03f8f1
2006-04-05 11:05:41

A study of supernova remnants "“ material blown out into space during death throes of giant stars "“ has shown that a bubble of gas enveloping our Solar System is being shoved backwards by the debris of another, more recent, supernova. Over the last few million years, several stars have exploded within the Milky Way and they have left behind bubbles of expanding, hot gas that radiate low-energy X-rays. The Solar System sits within one of these shells, known as the "Local Hot...

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2006-02-21 07:32:40

SWRI -- When Voyager 1 finally crossed the "termination shock" at the edge of interstellar space in December 2004, space physicists anticipated the long-sought discovery of the source of anomalous cosmic rays. These cosmic rays, among the most energetic particle radiation in the solar system, are thought to be produced at the termination shock - the boundary at the edge of the solar system where the million-mile-per-hour solar wind abruptly slows. A mystery unfolded instead when Voyager data...

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2006-01-13 07:39:49

Berkeley -- Astronomers announced Thursday what may be the first discovery of a helical magnetic field in interstellar space, coiled like a snake around a gas cloud in the constellation of Orion. "You can think of this structure as a giant, magnetic Slinky wrapped around a long, finger-like interstellar cloud,'' said Timothy Robishaw, a graduate student in astronomy at the University of California, Berkeley. "The magnetic field lines are like stretched rubber bands; the tension squeezes the...

e917c212cdce9ff397ebf6ed0e9a80181
2006-01-05 11:00:00

Gemini Observatory -- A storm of billowing clouds blown by the winds from massive stars, and set aglow by their light, is the focus of a striking image released today by Gemini Observatory. Known as the N44 superbubble complex, this cloudy tempest is dominated by a vast bubble about 325 by 250 light-years across. A cluster of massive stars inside the cavern has cleared away gas to form a distinctive mouth-shaped hollow shell. While astronomers do not agree on exactly how this bubble has...

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2005-11-30 11:43:06

NASA -- Scientists using NASA's Chandra X-ray Observatory have witnessed a cosmic rite of passage, the transition from a supernova to a supernova remnant, a process that has never seen in much detail until now, leaving it poorly defined. A supernova is a massive star explosion; the remnant is the beautiful glowing shell that evolves afterwards. When does a supernova become supernova remnant? When does the shell appear and what powers its radiant glow? A science team led by Dr. Stefan Immler...

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2005-10-04 08:42:52

NASA -- Intricate wisps of glowing gas float amid a myriad of stars in this image created by combining data from NASA's Hubble Space Telescope and Chandra X-ray Observatory. The gas is a supernova remnant, cataloged as N132D, ejected from the explosion of a massive star that occurred some 3,000 years ago. This titanic explosion took place in the Large Magellanic Cloud, a nearby neighbor galaxy of our own Milky Way. The complex structure of N132D is due to the expanding supersonic shock wave...

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2005-09-26 13:35:00

NASA's Voyager 1 has passed into the border region at the edge of the solar system and now is sending back information about this never-before-explored area, say scientists at the University of Maryland. "We have confirmed, for the first time, that Voyager 1 crossed the termination shock on Dec. 16, 2004," said Frank McDonald, a senior research scientist at the university's Institute for Physical Science and Technology, and a coauthor on two of four Voyager 1 papers published in the Sept. 23...


Latest Interstellar medium Reference Libraries

7_9d2e259c13e5a649c6295922288878812
2004-10-19 04:45:43

UV Astronomy -- UV astronomy is the branch of astronomy and astrophysics which deals with objects visible in ultraviolet (UV) radiation. UV radiation ranges approximatively from 10nm (extreme UV) to 380nm (near UV). Ultraviolet line spectrum measurements are used to discern the chemical composition, densities, and temperatures of interstellar medium, and the temperature and composition of hot young stars. UV observations can also provide essential information about the evolution of...

6_53083d96ff77dbf99c47ef10b6a209332
2004-10-19 04:45:41

Molecular Cloud -- Molecular clouds are interstellar nebulae that have a density and size sufficient to permit the formation of H2, molecular hydrogen. However, this molecule is difficult to detect, and the molecule most used to trace the H2 is CO (carbon monoxide). The ratio between CO luminosity and H2 mass is roughly constant, although there are reasons to doubt this assumption in observations of some other galaxies. In the Milky Way, molecular clouds account for roughly one-half...

6_465ffbdda99223eeee479def3ec0523d2
2004-10-19 04:45:41

Interstellar Cloud -- Interstellar cloud is the generic name given to accumulations of gas and dust in our galaxy. Depending on the density, size and temperature of a given cloud, the hydrogen in it can be neutral (HI clouds) or molecular (molecular clouds). Chemical compositions Analysing the composition of interstellar clouds is achieved by studying electromagnetic radiation that we receive from them. Large radio telescopes scan the intensity in the sky of particular frequencies of...

6_02132514ceb20be8f009384c891c09472
2004-10-19 04:45:41

Heliopause -- The heliopause is the boundary where our Sun's solar wind is stopped by the interstellar medium. The solar wind blows a "bubble" in the interstellar medium (the rareified hydrogen and helium gas that permeates the galaxy). The point where the solar wind's strength is no longer great enough to push back the interstellar medium is known as the heliopause, and is often considered to be the outer "border" of the solar system. The distance to the heliopause is not precisely...

6_27cd6c2b382d1ebdf3550737650c941e2
2004-10-19 04:45:41

Emission Nebula -- In astronomy, emission nebulae are clouds of ionized gas, emitting light of various colors. The most common source for ionization are high-energy photons emitted from a nearby young, hot star. Usually, a young star will ionize part of the same cloud from which it was born. Only big, hot stars can release the amount of energy required to ionize a significant part of a cloud. Often, an entire cluster of young stars is doing the work. The nebula's color depends on...

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Word of the Day
drawcansir
  • A blustering, bullying fellow; a pot-valiant braggart; a bully.
This word is named for Draw-Can-Sir, a character in George Villiers' 17th century play The Rehearsal.
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