The first galaxies formed before the Universe was less than one billion years old and were much smaller than the giant systems -- including the Milky Way -- that we see today. So somehow the average galaxy size has increased ...
Astronomy
Oct 13, 2010
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Astronomers believe they have discovered the origin of our universe's first super-massive black holes, which formed some 13 billion years ago.
Astronomy
Aug 25, 2010
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(PhysOrg.com) -- A spectacular new image of the Sculptor Galaxy (NGC 253) has been taken with the ESO VISTA telescope at the Paranal Observatory in Chile as part of one of its first major observational campaigns. By observing ...
Astronomy
Jun 16, 2010
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(PhysOrg.com) -- A newly discovered star outside the Milky Way has yielded important clues about the evolution of our galaxy. Located in the dwarf galaxy Sculptor some 280,000 light-years away, the star has a chemical make-up ...
Astronomy
Mar 3, 2010
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(PhysOrg.com) -- For more than two decades, the cold dark matter theory has been used by cosmologists to explain how the smooth universe born in the big bang more than 13 billion years ago evolved into the filamentary, galaxy-rich ...
Astronomy
Jan 13, 2010
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(PhysOrg.com) -- Ultraluminous infrared galaxies ((ULIRGs) are galaxies whose luminosity exceeds that of a trillion suns; for comparison, the Milky Way galaxy has a typical (and much more modest) luminosity of only about ...
Astronomy
Nov 27, 2009
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(PhysOrg.com) -- Peering through the thick dust clouds of our galaxy's "bulge" (the myriads of stars surrounding its center), a team of astronomers has unveiled an unusual mix of stars in the stellar grouping known as Terzan ...
Astronomy
Nov 25, 2009
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(PhysOrg.com) -- A new website will give everyone the chance to contribute to science by playing a 'cosmic fruit machine' and compare images of colliding galaxies with millions of simulated images of galactic pile-ups.
Astronomy
Nov 24, 2009
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(PhysOrg.com) -- Ram pressure is the drag force that results when something moves through a fluid -- much like the wind you feel in your face when bicycling, even on a still day -- and occurs in this context as galaxies orbiting ...
Astronomy
Sep 30, 2009
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(PhysOrg.com) -- As scientists attempt to learn more about how galaxies evolve, an open question has been whether collisions with our dwarf galactic neighbors will one day tear apart the disk of the Milky Way.
Astronomy
Aug 31, 2009
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