News tagged with galaxy formation
Black holes and star formation
(PhysOrg.com) -- It has long been recognized that galaxy mergers or even close interactions can play a vital role in shaping the morphology of galaxies. One way they can do so, it is thought, is by triggering ...
Feb 09, 2012 |
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Do black holes help stars form?
(PhysOrg.com) -- The center of just about every galaxy is thought to host a black hole, some with masses of thousands of millions of Suns and consequently strong gravitational pulls that disrupt material around ...
Feb 03, 2012 |
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Classic portrait of a barred spiral galaxy
(PhysOrg.com) -- The NASA/ESA Hubble Space Telescope has taken a picture of the barred spiral galaxy NGC 1073, which is found in the constellation of Cetus (The Sea Monster). Our own galaxy, the Milky Way, ...
Feb 03, 2012 |
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The wild early lives of today's most massive galaxies
(PhysOrg.com) -- Using the APEX telescope, a team of astronomers has found the strongest link so far between the most powerful bursts of star formation in the early Universe, and the most massive galaxies ...
Jan 25, 2012 |
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ALMA early science result reveals starving galaxies
(PhysOrg.com) -- Astronomers using the partially completed ALMA observatory have found compelling evidence for how star-forming galaxies evolve into 'red and dead' elliptical galaxies, catching a large group ...
Jan 11, 2012 |
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Herschel and Spitzer see nearby galaxies' stardust
(PhysOrg.com) -- The cold dust that builds blazing stars is revealed in new images that combine observations from the Herschel Space Observatory, a European Space Agency-led mission with important NASA contributions; ...
Jan 10, 2012 |
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A universal law for star formation
(PhysOrg.com) -- Star formation is studied by astronomers not only because it produces new stars and planetary systems. It also generates copious amounts of ultraviolet light that heats dust which in turn ...
Jan 09, 2012 |
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Image: Active Galaxy Centaurus A
(PhysOrg.com) -- Resembling looming rain clouds on a stormy day, dark lanes of dust crisscross the giant elliptical galaxy Centaurus A.
Jan 04, 2012 |
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A 'Rose' made of galaxies
(PhysOrg.com) -- In celebration of the twenty-first anniversary of the Hubble Space Telescope's deployment in April 2011, astronomers at the Space Telescope Science Institute pointed Hubble's eye to an especially ...
Dec 21, 2011 |
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How can growing galaxies stay silent?
Beginning around 2005, astronomers began discovering the presence of very large galaxies at a distance of around 10 billion lightyears. But while these galaxies were large, they didn’t appear to have ...
Dec 19, 2011 |
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Hubble racks up 10,000 science papers
(PhysOrg.com) -- NASA's Hubble Space Telescope has passed another milestone in its 21 years of exploration: the 10,000th refereed science paper has been published. This makes Hubble one of the most prolific ...
Space & Earth / Space Exploration
Dec 07, 2011 |
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Researcher peers into universe's ancient past to better know how stars form
(PhysOrg.com) -- It takes light from our closest star, the Sun, about eight minutes to reach Earth. But light that leaves stars in distant galaxies takes a lot more time to reach our planet — billions of years more.
Dec 07, 2011 |
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Astronomers look to neighboring galaxy for star formation insight
An international team of astronomers has mapped in detail the star-birthing regions of the nearest star-forming galaxy to our own, a step toward understanding the conditions surrounding star creation.
Nov 30, 2011 |
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NASA to support IU astronomer's quest to develop largest-ever star formation database
(PhysOrg.com) -- Samir Salim has a lot of space to fit into a new NASA-funded database; about 11 million galaxies of it would be a ballpark estimate based on the number of galaxies for which distances can be estimated to ...
Nov 21, 2011 |
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A serendipitous gravitational lens
(PhysOrg.com) -- The path traveled by a light beam will bend in the presence of matter. This remarkable prediction, reached by Einstein in his theory of general relativity, was confirmed by observations of ...
Nov 21, 2011 |
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Galaxy formation and evolution
The study of galaxy formation and evolution is concerned with the processes that formed a heterogeneous universe from a homogeneous beginning, the formation of the first galaxies, the way galaxies change over time, and the processes that have generated the variety of structures observed in nearby galaxies. It is one of the most active research areas in astrophysics.
Galaxy formation is believed to occur, from structure formation theories, as a result of tiny quantum fluctuations in the aftermath of the Big Bang. It is widely accepted that galaxy evolution occurs within the framework of a Λ Cold Dark Matter cosmology; that is to say that clustering and merging is how galaxies gain in mass, and can also determine their shape and structure.
For more information about Galaxy formation and evolution, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
