Quantcast

Latest Wolf-Rayet star Stories

1603631256bf14efbaac8c0aec0a48fd1
2008-10-21 11:00:00

A new image released by ESO shows the amazing intricacies of a vast stellar nursery, which goes by the name of Gum 29. In the center, a small cluster of stars "” called Westerlund 2 "” has been found to be the home of one of the most massive double star systems known to astronomers. Gum 29 is a huge region of hydrogen gas that has been stripped of its electrons (ionized) by the intense radiation of the hot young stars located at its center. Astronomers call this an HII...

7637195beef1ff0efdc0d6f1c9872b891
2008-10-10 11:00:00

Astronomers have used ESO's Very Large Telescope Interferometer to conduct the first high resolution survey that combines spectroscopy and interferometry on intermediate-mass infant stars. They obtained a very precise view of the processes acting in the discs that feed stars as they form. These mechanisms include material infalling onto the star as well as gas being ejected, probably as a wind from the disc. Infant stars form from a disc of gas and dust that surrounds the new star and, later,...

2008-09-19 17:02:55

Astronomers have confirmed the weight of the most massive star in the galaxy. This behemoth, estimated to be roughly 116 times the mass of the sun, dwarfs most other stars in the galaxy. In fact, the next most massive star is about 89 solar masses, and it is a gravitationally bound sister to the record setter. The next most massive ever weighed is 83 solar masses. Theory holds that stars can be up to about 150 solar masses. Discovery of the record-setting stars were first...

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...


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) »
Word of the Day
abrosia
  • Wasting away as a result of abstinence from food.
The word 'abrosia' comes from a Greek roots meaning 'not' and 'eating'.