Stig Östlund

fredag, maj 03, 2013

Super Stars -- Science Nation



Här finns en ytterligare videoclip ("guldgruva") att hämta för den vetgirige : http://www.youtube.com/user/VideosatNSF
Anm.: men det är väl så att om man är vetgirig har man nog hittat denna site för länge sedan (?)




Who are the biggest super stars in the universe? For Adam Burrows, an astrophysics professor at Princeton University, it's not who, but "what," and they are far from Hollywood, or even Earth, for that matter. Burrows would tell you that the biggest super stars are supernovae--stars that die in massive explosions. Burrows investigates supernovae and recently created 3-D computer simulations showing the actual moment of a star's death. Credit: National Science Foundation


RELATED MULTIMEDIA

an artist's impression of a star system that may explode as a Type .Ia supernova
 
Scientists in California have discovered a new way that stars explode. The discovery hinges on an unusual explosion in the galaxy NGC 1821, roughly 160 million light years away, according to astronomer Dovi Poznanski of the Lawrence Berkeley National Laboratory. Light from the exploding star reached Earth in 2002 and was recorded by a robotic telescope at Lick Observatory, near San Jose, Calif. Read more in this news release. Credit: Tony Piro (2005)
image of Supernova 2008ha
 
Caroline Moore, a 14-year-old from Warwick, N.Y., has made a mark on astronomy with the discovery of Supernova 2008ha. Not only is she the youngest person to discover a supernova, but this particular supernova has been identified as a different type of stellar explosion. There are two main types of supernova: Type Ia and Type II, both producing powerful explosions. Read more in this Discovery. Credit: Robert E. Moore
illustration of a supernova explosion
 
Astronomers announced in 2008 that they found a novel explanation for a rare type of super-luminous stellar explosion that may have produced a new type of object known as a quark star. A quark star is a hypothetical type of star composed of ultra dense quark matter. Quarks are the fundamental components of protons and neutrons, which make up the nucleus of atoms. Read more in this Discovery. Credit: NASA/CXC/M.Weiss
image of a black hole
 
A new infrared image has captured the center of our galaxy in never-before-seen detail--showing stars and gas swirling into the super massive black hole that lurks at the heart of our own Milky Way. See more in this Science Nation video. Credit: Science Nation, National Science Foundation
 
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