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Latest Interstellar medium Stories

Astronomers Need Your Help Looking For Space Anomalies
2012-12-19 13:55:27

Lee Rannals for redOrbit.com — Your Universe Online Astronomers are reaching out to the public and asking for a little help in a study to find holes in dust clouds that are threaded throughout our galaxy. By looking at images from the Herschel Space Observatory, combined with those from NASA´s Spitzer satellite, members of the public can join the scientists by helping to distinguish between dense clumps of cold dust and possible holes in these dusty clouds. Dust clouds do...

Observatory Finds Water Vapor In Cosmic Cloud That Could Drown Earth
2012-10-09 14:54:53

Lee Rannals for redOrbit.com — Your Universe Online The European Space Agency (ESA) said its Herschel space observatory found a gas and dust cloud that contains enough water vapor to fill Earth's oceans more than 2,000 times over. The new observations of a pre-stellar core--or cold, dark clouds of gas and dust--in the constellation of Taurus are the first detection of water vapor in a molecular cloud on the verge of star formation. “To produce that amount of vapor, there...

Voyager 1 Nearing Interstellar Space
2012-08-05 06:27:51

[ Watch the Video: Voyager 1 at the Final Frontier ] redOrbit Staff & Wire Reports - Your Universe Online The levels of high-energy cosmic rays originating from outside our solar system and the levels of lower-energy particles originating from within have been undergoing changes at a faster rate than at any other time in the past seven years, NASA officials announced on Friday. Citing data obtained from the Voyager 1 spacecraft, the US space agency revealed that there was a...

Plasma Waves Move Faster Than Shockwaves
2012-07-20 08:07:31

Lawrence LeBlond for redOrbit.com - Your Universe Online The Sun and the dynamic space weather system that envelops the Earth are what researchers are trying to get a better understanding of with the help of Heliophysics nuggets -- collections of early scientific results, new research techniques and instrument updates. More than 99 percent of the matter found in the universe resembles nothing like what we have here on Earth, according to scientists from NASA´s Goddard Space Flight...

Voyager 1 Entering Interstellar Space
2012-06-15 13:52:45

Lee Rannals for redOrbit.com After several decades of making a lonely journey across our solar system, Voyager 1 has signaled to NASA that it may have reached the edge of interstellar space. The spacecraft, which launched in 1977, is now roughly 11 billion miles away and traveling at 6 miles per second. NASA said it takes Voyager 1's data 16 hours and 38 minutes to reach the antennas of its Deep Space Network on Earth. Data from the spacecraft indicates that the 34-year-old...

Speed Of The Sun 'Shockingly' Slower Than Believed
2012-05-11 04:06:18

[ Watch the Video ] A team of NASA researchers has uncovered new data showing that the sun is moving more slowly through our galaxy than previously believed -- a discovery that suggests a shock wave believed to precede the heliosphere might not actually exist, the US space agency revealed on Thursday. According to Andrew Fazekas of National Geographic News, NASA's Interstellar Boundary Explorer (IBEX) satellite measured the speeds of various interstellar particles along the outer edges...

Herschel Captures Cygnus-X: The Cool Swan Glowing In Flight
2012-05-11 03:05:41

Chaotic networks of dust and gas signpost the next generations of massive stars in this stunning new image of the Cygnus-X star-nursery captured by ESA´s Herschel space observatory. Cygnus-X is an extremely active region of massive-star birth some 4500 light-years from Earth in the constellation of Cygnus, the Swan. Using Herschel´s far-infrared eyes, astronomers can seek out regions where dust has been gently heated by stars, pointing them to dense clumps of gas where new...

Study Finds Way To Observe Ion Responsible For Early Star Formation
2012-04-14 06:02:08

Researchers from the University of Arizona (UA) claim that they have found a way to observe the triatomic hydrogen ion believed to be the key element responsible for the formation of the first stars following the Big Bang. According to an article published to the UA News website on Wednesday, the molecule, which is known as H3+, is an ion that consists of three hydrogen atoms with just a pair of electrons to share between them, giving it a positive charge. It is believed to be the catalyst...

Image 1 - New 'Alien' Particles Have Entered Our Solar System
2012-01-31 13:59:55

[ Watch the Video ] Researchers have measured neutral "alien" particles that have entered our solar system from interstellar space. The team used NASA's Interstellar Boundary Explorer (IBEX) spacecraft to find the neutral particles, which make up about half the material outside the heliosphere. The heliosphere is the bubble in which our Sun and planets reside and is formed by the interaction between the solar wind and the interstellar medium. Electrically charged particles cannot...


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
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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