News tagged with massive galaxy

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Massive galaxies formed when universe was young

(PhysOrg.com) -- Some of the universe's most massive galaxies may have formed billions of years earlier than current scientific models predict, according to surprising new research led by Tufts University. ...

dateNov 24, 2010 in Astronomy
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Ultra-luminous X-ray sources in starburst galaxies

Ultra-luminous X-ray sources (ULXs) are point sources in the sky that are so bright in X-rays that each emits more radiation than a million suns emit at all wavelengths. ULXs are rare. Most galaxies (including ...

dateDec 22, 2014 in Astronomy
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Galaxies Demand a Stellar Recount

(PhysOrg.com) -- For decades, astronomers have gone about their business of studying the cosmos with the assumption that stars of certain sizes form in certain quantities. Like grocery stores selling melons ...

dateAug 19, 2009 in Astronomy
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Are ultra-luminous galaxies colliding?

(Phys.org) —ltra-luminous infrared galaxies ((ULIRGs) are galaxies whose luminosity exceeds that of a trillion suns, By way of comparison, our Milky Way galaxy has a typical modest luminosity of only about ...

dateJun 27, 2014 in Astronomy
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Star-birth myth 'busted' (w/ Podcast)

(PhysOrg.com) -- An international team of researchers has debunked one of astronomy's long held beliefs about how stars are formed, using a set of galaxies found with CSIRO’s Parkes radio telescope.

dateAug 25, 2009 in Astronomy
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M82: 'Survivor' Black Holes May Be Mid-Sized

(PhysOrg.com) -- New evidence from NASA's Chandra X-ray Observatory and ESA's XMM-Newton strengthens the case that two mid-sized black holes exist close to the center of a nearby starburst galaxy. These "survivor" ...

dateApr 29, 2010 in Astronomy
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Peering into a gateway opened 50 years ago

Saturday marked the 50th anniversary of the discovery of the quasar - an extremely bright object powered by matter falling into a super-massive black hole lying in the heart of a galaxy.

dateMar 17, 2013 in Astronomy
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