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29 June 2010
Finding the Origin of Milky Way's Ancient Stars
From the Royal Astronomical Society Many of the Milky Way’s ancient stars are remnants of other smaller galaxies torn apart by violent galactic collisions around five billion years ago, according to researchers at Durham University, who publish their results in a new paper in the journal Monthly Notices of the Royal Astronomical Society. (...)Read the [...]
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26 May 2010
Newly-Discovered Stellar Nurseries in the Milky Way
Our Milky Way churns out about seven new stars per year on average. More massive stars are formed in what's called H II regions, so-named because the gas present in these stellar nurseries is ionized by the radiation of the young, massive stars forming there. Recntly-discovered regions in the Milky Way that are nurseries for [...]
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17 March 2010
Planck Reveals Giant Dust Structures in our Local Neighborhood
Dust has never looked so beautiful! This new image from the Planck spacecraft shows giant filaments of cold dust stretching through our galaxy. The image spans about 50 degrees of the sky, showing our local neighborhood within approximately 500 light-years of the Sun. “What makes these structures have these particular shapes [...]
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03 March 2010
Second-Generation Star Supports Cannibal Theory of Milky Way
A newly discovered red giant star is a relic from the early universe — a star that may have been among the second generation of stars to form after the Big Bang. Located in the dwarf galaxy Sculptor some 290,000 light-years away, the star has a remarkably similar chemical make-up to the Milky Way’s oldest [...]
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23 February 2010
Alien Star Clusters Are Invading the Milky Way
We're being invaded! About one-fourth of the star clusters in our galaxy are actually invaders from other galaxies, according to a new paper. Research from a team of scientists from Swinburne University of Technology in Australia shows that that many of our galaxy’s globular star clusters are actually foreigners – having been born [...]
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21 February 2010
All-Sky Radio Image in 60 Seconds, No Moving Parts
This image is a software-calibrated image with high signal-to-noise ratio at a frequency of 120 MHz, of the radio sky above Effelsberg, Germany, on November10, 2009. It has North at the top and East at the left, just as a person would have seen the entire sky when lying on their back on a flat [...]
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18 February 2010
Astronomy Without A Telescope – Don’t Make a Meal of It
You should always put out the old dinner set when you have astronomers around. It all starts innocently enough with imagine this wineglass is the Earth rotating on its axis… But then someone decides that large plate is just right to show the orientation of an orbital plane and more wine glasses are brought to [...]
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09 February 2010
Seven-Year WMAP Results: No, They're NOT Anomalies
Since the day the first Wilkinson Microwave Anisotropy Probe (WMAP) data were released, in 2003, all manner of cosmic microwave background (CMB) anomalies have been reported; there's been the cold spot that might be a window into a parallel universe, the "Axis of Evil", pawprints of local interstellar neutral hydrogen, and much, much more. But do [...]
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08 February 2010
If the Earth is Rare, We May Not Hear from ET
If civilization-forming intelligent life is rare in our Milky Way galaxy, chances are we won't hear from ET before the Sun goes red giant, in about five billion years' time; however, if we do hear from ET before then, we'll have lots of nice chats before the Earth is sterilized. That's the conclusion from a recent [...]
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06 January 2010
Milky Way Has a "Squashed Beachball"-Shaped Dark Matter Halo
This illustration shows the visible Milky Way galaxy surrounded by a "squashed beachball"-shaped dark matter halo. Click the image for a movie showing a 3D flyaround view. Source: UCLA Our galaxy is shaped like a flat spiral right? Not if you're talking about dark matter. Astronomers announced today that the Milky Way's dark matter halo, which [...]
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04 January 2010
Intergalactic Connection is Older, Longer than Thought
Our galaxy has a streamer, though it's not like the ones you had on your bike as a kid: this streamer is a flow of largely hydrogen gas that originates in the Large and Small Magellanic Clouds, two of our closest galactic neighbors. New observations of the stream have helped to revise its age and [...]
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03 December 2009
Stellar Escapees Await Detection
The structure of the Universe and the formation of stars from concentrated dust leads them to be clumped into galaxies of all sorts. But adrift between the galaxies may be billions of undiscovered lonely stars. These escaped stars, thrown out of their homes by gravitational interactions, may number in the billions for the Milky Way [...]
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02 December 2009
Get the Big Picture of the Milky Way at the Adler Planetarium
Astronomy is all about getting the big picture of our place in the cosmos, but some pictures are bigger than others. This one is really big. The world's largest image of our Milky Way galaxy went on display today at the Adler Planetarium in Chicago. The image spans an area of 37 [...]
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25 November 2009
Astronomers Dig Up Relic of the Milky Way's Central Bulge
Like archaeologists who dig through the layers of dirt to unearth crucial pieces of the history of mankind, astronomers have been gazing through the thick layers of interstellar dust obscuring the central bulge of the Milky Way and have unveiled an extraordinary cosmic relic. Within the bulge is an unusual mix of stars in [...]
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10 November 2009
Great Observatories Combine for Stunning Look at Milky Way
All we can say is, "Wow!" In celebration of the International Year of Astronomy 2009, NASA's Great Observatories — the Hubble Space Telescope, the Spitzer Space Telescope, and the Chandra X-ray Observatory — have collaborated to produce an unprecedented image of the central region of our Milky Way galaxy. This is a never-before-seen view [...]
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