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galaxies

Ancient Galaxy ‘Bursting’ with Stars

April 17, 2013

Want to stay on top of all the space news? Follow @universetoday on Twitter Most of the early galaxies that astronomers have been able to observe are small with a low-to-moderate amount of star production. But now the Herschel Space Observatory has found a massive dust-filled galaxy churning out stars at an incredible rate, with [...]

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How Big Are Galaxies?

April 3, 2013

I’m going to refrain from the initial response that comes to mind… actually, no I won’t — they’re really, really, really big!!!! </Kermit arms> Ok, now that that’s out of the way check out this graphic by Arecibo astrophysicist Rhys Taylor, which neatly illustrates the relative sizes of 25 selected galaxies using images made from [...]

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Behold: The Largest Known Spiral Galaxy

January 10, 2013

Astronomers have long known that a spectacular barred spiral galaxy named NGC 6872 is a behemoth, but by compiling data from several space- and ground-based observatories and running a few computer simulations, they have now determined this is the largest spiral galaxy we know of. Measuring tip-to-tip across its two outsized spiral arms, NGC 6872 [...]

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Astronomers Find a “Spine” Along Spiral Arms of the Milky Way

January 9, 2013

Astronomers have found what may be considered a piece of a galactic skeleton; a dark structure of gas and dust that might provide a backbone on which one of the spiral arms extend from the central bar of the Milky Way galaxy. “This ‘bone’ is likely made from high density gas — the type that [...]

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Hubble Census Unveils Galaxies Shining Near Cosmic Dawn

December 13, 2012

This new image of the Hubble Ultra Deep Field (HUDF) 2012 campaign reveals a previously unseen population of seven faraway galaxies, which are observed as they appeared in a period 350 million to 600 million years after the Big Bang. Credit: NASA, ESA, R. Ellis (Caltech), and the UDF 2012 Team Astronomers using NASA’s Hubble [...]

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