"Magnetic Assist Helps Big Stars Form"
Space.com (November 23, 2009)
"Massive stars in the process of forming likely rely on magnetic fields to steer gas onto their surfaces and help them grow into adults, according to new images.
"The findings come from radio observations of a young protostar called Source I (pronounced "Source Eye") next to the Orion nebula, which sits in the constellation's sword. The star has been around no more than 100,000 years. Our sun, by comparison, is 4.6 billion years old and middle-aged.
"Scientists know a thing or two about how low-mass stars like the sun form. But they have been puzzled over the birth of high-mass stars that weigh in at eight solar masses and greater, in part because the massive stars are rare and spend their youths enshrouded by a veil of dust and gas.
" 'We know how these stars die, but not how they are born,' said study researcher Lincoln Greenhill of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Mass. ..."
The trick, this time, was to "look" at the very young, very massive, stars at radio wavelengths. Our eyes pick up much higher wavelengths, which works fine for us. But "visible light" is easily blocked by the clouds of gas and dust that surround forming stars. That gas and dust is fairly transparent to electromagnetic radiation at radio wavelengths.
One of the puzzles about very massive stars, was working out how gravity could pull enough matter together to form them. Turns out, there's evidence that magnetic fields are involved, too.
This knowledge won't help this household keep the sidewalk shoveled this winter - but I think there's more to life than shoveling snow and eating.
And, of course, watching television.
Subscribe to:
Post Comments (Atom)
Unique, innovative candles
Visit us online: | |
Spiral Light Candle | • Find a Retailer • Spiral Light Candle online store |
Top 10 Most-Viewed Posts
-
(from INKCINCT Cartoons, used w/o permission) I very seldom copy an entire post in this blog, but trying to describe this cartoon would have...
-
" Coconut crab " AbsoluteAstronomy.com " The coconut crab, Birgus latro, is the largest land-living arthropod in the world an...
-
Ploak.com Article Directory " Your one-stop source for free articles. Do you need contents to add to your web site? Or articles for use...
-
" How to Think Like an Interior Designer " Jaime Derringer, via Shelpterpop (July 29, 2010) " It takes a unique mind to perfe...
-
Before anything else, repeating from an earlier post: Google has launched a 'people finder' for Japan, in Japanese, English, Korea...
-
Update (October 11, 2010) Another article about Reaction Engines Ltd.'s Skylon: " Airplanes in Space? " Irene Klotz, Space ...
-
" Stan Lee Unveils 3 New Superheroes at Comic-Con " Underwire, Wired (July 22, 2010) " A time traveler, an unwitting heir to ...
-
" Hellgrammite (Dobsonfly Larvae) (Corydalus cornutus) " Texas Parks and Wildlife " Other Names " Eastern Dobsonfly ...
-
" 'Lost City' of Tanis Found, but Often Forgotten " Brian Handwerk, Mysteries of the Ancient World, National Geographic (...
-
Whether you call it trafficking in persons, human trafficking, or slavery, buying and selling people isn't nice. And, in quite a few cou...
Today's News! Some of it, anyway
Actually, some of yesterday's news may be here. Or maybe last week's.
The software and science stuff might still be interesting, though. Or not.
The Lemming thinks it's interesting: Your experience may vary.
The software and science stuff might still be interesting, though. Or not.
The Lemming thinks it's interesting: Your experience may vary.
("Following" list moved here, after Blogger changed formats)
No comments:
Post a Comment