Quantcast
Last updated on April 18, 2014 at 0:10 EDT

Latest Wolf-Rayet star Stories

17f559ac3f42e555bd841b183dfc4dda1
2008-08-22 12:45:00

Cambridge, MA - A new image from NASA's Spitzer Space Telescope tells a tale of life and death, and reveals a rich family history. The striking infrared picture shows a colorful cosmic cloud, called W5, studded with multiple generations of blazing stars. It also provides dramatic new evidence that massive stars - through their brute winds and radiation - can trigger the birth of stellar newborns. "Triggered star formation continues to be very hard to prove," said Xavier Koenig of the...

1ac82bcf0f9009971b4510001abc890c1
2008-07-24 16:10:00

A European-led team of astronomers are providing hints that a recent supernova may not be as normal as initially thought. Instead, the star that exploded is now understood to have collapsed into a black hole, producing a weak jet, typical of much more violent events, the so-called gamma-ray bursts. The object, SN 2008D, is thus probably among the weakest explosions that produce very fast moving jets. This discovery represents a crucial milestone in the understanding of the most violent...

2008-07-11 15:00:09

Almost two months ago my newborn son began his life just as stars go through a life cycle of their own. Stars are formed from within a nebula, a cloud of gas and dust. Over time, hydrogen gas is pulled together by gravity and begins to spin faster and faster until the gas heats up to spark nuclear fusion in the core, and a new star is formed. In the first stages of life, a star fuses hydrogen gas into helium. Ninety percent of stars are in this main sequence stage. The sun, about 4.5...

9b5f5d7e34abe487309976c08f83b7a81
2008-06-19 09:44:57

NSF-funded basic research may cause astronomers to re-examine the masses and ages of young stars and star formation theories Two stars, each with the same mass and in orbit around each other, are twins that one would expect to be identical. So astronomers were surprised when they discovered that twin stars in the Orion Nebula, a well-known stellar nursery 1,500 light years away, were not identical at all. In fact, these stars exhibited significant differences in brightness, surface...

27bf1510085bceb775592a1528f515541
2008-04-16 13:35:00

A new image from NASA's Galaxy Evolution Explorer shows baby stars sprouting in the backwoods of a galaxy -- a relatively desolate region of space more than 100,000 light-years from the galaxy's bustling center. The striking image, a composite of ultraviolet data from the Galaxy Evolution Explorer and radio data from the National Science Foundation's Very Large Array in New Mexico, shows the Southern Pinwheel galaxy, also known simply as M83. In the new view, the main spiral, or stellar,...

b0f733d7b813c925b6c191c7a3113eca1
2008-03-31 15:55:00

Astronomers have spied a faraway star system that is so unusual, it was one of a kind -- until its discovery helped them pinpoint a second one that was much closer to home.In a paper published in a recent issue of the Astrophysical Journal Letters, Ohio State University astronomers and their colleagues suggest that these star systems are the progenitors of a rare type of supernova.They discovered the first star system 13 million light years away, tucked inside Holmberg IX, a small galaxy that...

ed1a7d022ee68893159a0b7ad8dee8071
2008-02-20 09:10:00

ESA's Integral has made the first unambiguous discovery of high-energy X-rays coming from a rare massive star at our cosmic doorstep, Eta Carinae. It is one of the most violent places in the galaxy, producing vast winds of electrically-charged particles colliding at speeds of thousands of kilometres per second. The only astronomical object that emits gamma-rays and is observable by the naked eye, Eta Carinae is monstrously large, so large that astronomers call it a hypergiant. It contains...

c85e8654577545dd1ed98df3c4f7e2ee1
2007-05-29 00:00:00

Using NASA's Far Ultraviolet Spectroscopic Explorer (FUSE) satellite and ground-based telescopes, astronomers have determined, for the first time, the properties of a rare, extremely massive, and young binary star system. The system, known as LH54-425, is located in the Large Magellanic Cloud, a satellite galaxy of our Milky Way. The binary consists of two O-stars, the most massive and luminous types of stars in the Universe. Spectra obtained by Georgia State University astronomer Stephen...

a8a8cb0db023024d0128cc8e8479f6721
2007-04-24 08:20:00

In celebration of the 17th anniversary of the launch and deployment of NASA's Hubble Space Telescope, a team of astronomers is releasing one of the largest panoramic images ever taken with Hubble's cameras. It is a 50-light-year-wide view of the central region of the Carina Nebula where a maelstrom of star birth - and death - is taking place. Hubble's view of the nebula shows star birth in a new level of detail. The fantasy-like landscape of the nebula is sculpted by the action of outflowing...

a373b9151166d30a4a1f72543a8b76c11
2007-04-04 13:20:00

In a galaxy far, far away, a massive star suffered a nasty double whammy. On Oct. 20, 2004, Japanese amateur astronomer Koichi Itagaki saw the star let loose an outburst so bright that it was initially mistaken for a supernova. The star survived, but for only two years. On Oct. 11, 2006, professional and amateur astronomers witnessed the star actually blowing itself to smithereens as Supernova 2006jc. "We have never observed a stellar outburst and then later seen the star explode," says...


Latest Wolf-Rayet star Reference Libraries

6_d67b2db586c7facec8388b5df78e57912
2004-10-19 04:45:42

Star -- A star is a self-gravitating sphere of plasma in hydrostatic equilibrium that generates energy in its interior through the process of nuclear fusion. Energy from this process radiates into space as electromagnetic radiation and neutrinos. Star formation and evolution As learned by star formation astronomers, stars are born in molecular clouds, regions of higher density of matter, and form by gravitational instability inside those clouds. High mass stars illuminate powerfully...

More Articles (1 articles) »