News tagged with massive galaxy

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Rare case of gravitational lensing reported (Update)

(Phys.org) -- Seeing is believing, except when you don't believe what you see. Astronomers using NASA's Hubble Space Telescope have found a puzzling arc of light behind an extremely massive cluster of galaxies ...

Jun 26, 2012
4.8 / 5 (21) 52 | with audio podcast

Giant black hole kicked out of home galaxy

(Phys.org) -- Astronomers have found strong evidence that a massive black hole is being ejected from its host galaxy at a speed of several million miles per hour. New observations from NASA's Chandra X-ray ...

Jun 04, 2012
4.5 / 5 (21) 6 | with audio podcast

Diagnosing a black hole flare

(Phys.org) -- Black holes can come in a wide range of masses. Some, with only about one solar mass, result from the supernova death of a massive star, while those at the center of galaxies (called supermassive ...

May 07, 2012
5 / 5 (4) 0 | with audio podcast

Old star, new trick

The Big Bang produced lots of hydrogen and helium and a smidgen of lithium. All heavier elements found on the periodic table have been produced by stars over the last 13.7 billion years. Astronomers analyze starlight to determine ...

Apr 30, 2012
5 / 5 (10) 30 | with audio podcast

A new paradigm for active galactic nuclei

(Phys.org) -- Seyfert galaxies are similar to normal galaxies like our own Milky Way except in one critical respect: their nuclei are fantastically bright, in extreme instances as luminous as 100 billion suns. ...

Apr 24, 2012
5 / 5 (3) 4 | with audio podcast

The lives of stars, or astronomers as paparazzi

Stars live for a long time, with even the most massive stars having lifetimes measured in millions of years. But, for a mere few thousand years towards the end of their lives, some massive stars go through ...

Apr 17, 2012
4 / 5 (2) 0

Watching a star explode

NASA's Astronomy Picture of the Day for March 22 features a snapshot of a supernova - a massive star explosion - discovered only a week ago.

Mar 23, 2012
4.4 / 5 (10) 3

Ultra-luminous x-ray sources

(PhysOrg.com) -- An ultra-luminous X-ray source (ULX) emits more radiation in the X-rays than do a million suns at all wavelengths. ULXs are rare: Most galaxies, including our own Milky Way, have none, and ...

Mar 19, 2012
5 / 5 (7) 1 | with audio podcast