Latest Supernovae Stories

Image 1 - Scientists Reveal How First Supernova Ever Recorded Occurred
2011-10-24 11:57:48

NASA said on Monday that its Spitzer Space Telescope and Wide-field Infrared Survey Explorer (WISE) have revealed how the first supernova ever recorded occurred. The space agency said that the new findings show that the explosion took place in a hollowed-out cavity, allowing material expelled by the star to travel much faster and father. "This supernova remnant got really big, really fast," Brian J. Williams, an astronomer at North Carolina State University in Raleigh, said in a press...

Chandra Images Middle-Aged Supernova Remnant
2011-10-13 04:09:51

G299.2-2.9 is an intriguing supernova remnant found about 16,000 light years away in the Milky Way galaxy. Evidence points to G299.2-2.9 being the remains of a Type Ia supernova, where a white dwarf has grown sufficiently massive to cause a thermonuclear explosion. Because it is older than most supernova remnants caused by these explosions, at an age of about 4,500 years, G299.2-2.9 provides astronomers with an excellent opportunity to study how these objects evolve over time. It also...

2011-10-11 09:28:03

Astrophysicists have found evidence of black holes destroying stars, a long-sought phenomenon that provides a new window into general relativity. The research, reported in the latest issue of the Astrophysical Journal, also opens up a method to search for the possible existence of a large population of presently undetectable "intermediate mass" black holes which are hypothesized to be precursors to the super-massive black holes at the centers of most large galaxies. The study was carried...

Survey Hints At Origin Of Type Ia Supernovae
2011-10-08 05:13:10

The largest survey to date of distant exploding stars is giving astronomers new clues to what´s behind the Type Ia supernovae they use to measure distances across the cosmos. These stellar explosions helped astronomers conclude more than a decade ago that dark energy is accelerating the expansion of the universe, and today (Tuesday, Oct. 4) earned the discoverers — including UC Berkeley physicist Saul Perlmutter — the 2011 Nobel Prize in Physics. But what caused them was a...

2011-10-07 09:02:35

News About Planet-Threatening Events Space is a violent place. If a star explodes or black holes collide anywhere in our part of the Milky Way, they´d give off colossal blasts of lethal gamma-rays, X-rays and cosmic rays and it´s perfectly reasonable to expect Earth to be bathed in them. A new study of such events has yielded some new information about the potential effects of what are called “short-hard” interstellar radiation events. Several studies in the past...

Most Ancient Supernovas Are Already Discovered
2011-10-05 06:30:26

Ten-billion-year-old exploding stars were a source of Earth's iron, TAU researchers say Supernovas – stars in the process of exploding – open a window onto the history of the elements of Earth's periodic table as well as the history of the universe. All of those heavier than oxygen were formed in nuclear reactions that occurred during these explosions. The most ancient explosions, far enough away that their light is reaching us only now, can be difficult to spot. A project...

2011-09-14 06:46:47

High-performance networks speed data on explosion's early discovery A recent discovery by scientists at the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California, Berkeley, of a supernova within hours of its explosion was made possible by a specialized telescope, state-of-the-art computational tools — and the high-speed data transmissions network of UC San Diego's High-Performance Wireless and Research Education Network (HPWREN), as well as the...

Latest Supernovae Reference Libraries

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...

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...

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...

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...

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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Word of the Day
  • A landsman who is making his first voyage at sea; a novice who enters naval service from rural life.
According to the OED, a grass-comber is also 'a sailor's term for one who has been a farm-labourer.'