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Latest Supernovae Stories

Two Different Sources for Supernova, Both Models Are Correct
2012-05-07 10:40:40

The exploding stars known as Type Ia supernovae serve an important role in measuring the universe, and were used to discover the existence of dark energy. They're bright enough to see across large distances, and similar enough to act as a "standard candle" - an object of known luminosity. The 2011 Nobel Prize in Physics was awarded for the discovery of the accelerating universe using Type Ia supernovae. However, an embarrassing fact is that astronomers still don't know what star systems make...

Image 1 - Supernovae Could Have Had Impact On Life On Earth
2012-04-24 12:12:07

New research by a Danish physicist suggests that life might have been influenced by supernovae near the Solar System. When massive stars reach the end of their life, they explode as supernovae, which can be brighter than an entire galaxy of normal stars. The remnants of these events release vast numbers of high-energy charged particles known as galactic cosmic rays (GCR). If a supernova is close enough to our Solar System, the enhanced GCR levels can have direct impacts on the...

A Star Explodes, Turns Inside-Out
2012-04-02 06:01:15

[ Watch the Video ] A new X-ray study of the remains of an exploded star indicates that the supernova that disrupted the massive star may have turned it inside out in the process. Using very long observations of Cassiopeia A (or Cas A), a team of scientists has mapped the distribution of elements in the supernova remnant in unprecedented detail. This information shows where the different layers of the pre-supernova star are located three hundred years after the explosion, and provides...

2012-03-29 13:53:43

A new X-ray study of the remains of an exploded star indicates that the supernova that disrupted the massive star may have turned it inside out in the process. Using very long observations of Cassiopeia A (or Cas A), a team of scientists has mapped the distribution of elements in the supernova remnant in unprecedented detail. This information shows where the different layers of the pre-supernova star are located three hundred years after the explosion, and provides insight into the nature of...

2012-03-28 06:26:24

WASHINGTON, LONDON and HONG KONG, March 28, 2012 /PRNewswire/ -- SuperNova Diagnostics®, Inc., a privately-held global diagnostics company for human and non-human health applications, announced that Neil J. Campbell, President and CEO, will be presenting at the 11th Annual Needham Healthcare Conference on April 4, 2012 at 2:20 p.m. ET at the New York Palace - 455 Madison Avenue, New York--in the Chairman's Conference Room. The presentation will include an overview of...

Image 1 - Astrophysicists Gain Insight Into Star Creation From NASA Satellite
2012-03-21 07:47:08

NASA's Swift satellite puts faraway stars and galaxies under a new lens. A combination of X-ray and ultraviolet observations from NASA's Swift satellite allow researchers to gain a more detailed look at specific stars and their activities. Most recently Swift was used to study a Type Ia supernova. While it's been known that Type Ia supernovae originate with a remnant star called a white dwarf, the X-ray and ultraviolet views allow researchers to view the events and matter that cause the...

2012-03-20 06:20:58

WASHINGTON, March 20, 2012 /PRNewswire-USNewswire/ -- Studies using X-ray and ultraviolet observations from NASA's Swift satellite provide new insights into the elusive origins of an important class of exploding star called Type Ia supernovae. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) These explosions, which can outshine their galaxy for weeks, release large and consistent amounts of energy at visible wavelengths. These qualities make them among the most...

Image 1 - Important Clue Uncovered For Origins Of A Type Of Supernovae Explosion
2012-03-04 06:11:31

Pitt team used Sloan Digital Sky Survey to determine that the merger of double white dwarfs is a plausible explanation for Type Ia supernovae The origin of an important type of exploding stars–Type Ia supernovae–have been discovered, thanks to a research team at the University of Pittsburgh. Studying supernovae of this type helps researchers measure galaxy distances and can lead to important astronomical discoveries. A paper detailing this research has been accepted for...

Rare Earth Element Discovered In Ancient Stars
2012-02-21 14:22:14

A team of researchers say they have discovered that a rare Earth element known as tellurium exists in three ancient stars that are nearly 12 billion years old. The new discovery helps support the theory that the element, along with even heavier elements in the periodic table, likely originated from a rare type of supernova. "We want to understand the evolution of tellurium – and by extension any other element – from the Big Bang to today," Anna Frebel, an assistant professor...

2012-02-21 12:00:00

WASHINGTON, Feb. 21, 2012 /PRNewswire-USNewswire/ -- Astronomers using NASA's Chandra X-ray Observatory have clocked the fastest wind yet discovered blowing off a disk around a stellar-mass black hole. This result has important implications for understanding how this type of black hole behaves. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) The record-breaking wind is moving about 20 million mph, or about 3 percent of the speed of light. This is nearly 10 times faster than...


Latest Supernovae Reference Libraries

6_c21be0ecb1b565a9be109a383c38223f2
2004-10-19 04:45:43

White Dwarf -- A white dwarf is a a star supported by electron degeneracy. A star like our Sun will become a white dwarf when it has exhausted its nuclear fuel. Near the end of its nuclear burning stage, such a star goes through a red giant phase and then expels most of its outer material (creating a planetary nebula) until only the hot (T > 100,000 K) core remains, which then settles down to become a young white dwarf. A typical white dwarf is half as massive as the Sun, yet only...

6_19859ff34fd03d00777232e2520ce83f5
2004-10-19 04:45:42

Supernova Remnant -- A supernova remnant (SNR) is made up of the materials left behind by the gigantic explosion of a star in a supernova. There are two possible routes to this end: either a massive star may cease to generate fusion energy in its core, and collapse inward under the force of its own gravity, or a white dwarf star may accumulate material from a companion star until it reaches a critical mass and undergoes a similar collapse. In either case, the resulting supernova...

6_79c799b9f03f60809a9d0aecf38491202
2004-10-19 04:45:42

Supernova -- A supernova is a star that increases its brightness drastically within a matter of days, making it appear as if a "new" star was born (hence "nova"). The "super" prefix distinguishes it from a mere nova, which also involves a star increasing in brightness, though to a lesser extent and through a much different mechanism. Astronomers have classified supernovae in several classes, according to the lines of different elements that appear in their spectra. The first...

6_dac4e7d6b8fb5cf3a1458d796b90d7a92
2004-10-19 04:45:42

Stellar Evolution -- Stellar evolution is the process of formation, life, and death of stars. It is one of the major topics of cosmogony. Star Birth and Life A star starts out as an enormous cloud of gas and dust many light-years across. Star formation begins when the cloud begins to condense under its own gravity. The processes that initiate this contraction are not fully understood. The cloud fragments fuse into stellar mass clouds known as protostars. Protostars do not emit...

6_19859ff34fd03d00777232e2520ce83f4
2004-10-19 04:45:42

Nova -- A nova is an enormous nuclear explosion caused by the accretion of hydrogen onto the surface of a white dwarf star. When a white dwarf has a close companion star, the companion will often begin to have its outer atmosphere drawn away from it by the white dwarf's gravity as the companion star ages and expands into a red giant. The gases so captured consist primarily of hydrogen and helium, the two principle constituents of matter in the universe. The gases are compacted on the...

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