White dwarf

[alokmohan]

PRESS RELEASE<br />Date Released: Tuesday, December 4, 2007<br />Source: Space Imaging<br /><br /><br /> <br /><br /> <br /><br />NASA's Hubble Space Telescope is providing strong evidence that white dwarfs, the burned-out relics of stars, are given a "kick" when they form. <br /><br />The sharp vision of Hubble's Advanced Camera for Surveys uncovered the speedy white dwarfs in the ancient globular star cluster NGC 6397, a dense swarm of hundreds of thousands of stars. <br /><br />Before the stars burned out as white dwarfs, they were among the most massive stars in NGC 6397. Because massive stars are thought to gather at a globular cluster's core, astronomers assumed that most newly minted white dwarfs dwelled near the center. <br /><br />Hubble, however, discovered young white dwarfs residing at the edge of NGC 6397, which is about 11.5 billion years old. <br /><br />"The distribution of young white dwarfs is the exact opposite of what we expected," said astronomer Harvey Richer of the University of British Columbia in Vancouver. "Our idea is that as aging stars evolve into white dwarfs, they are given a kick of 7,000 to 11,000 miles an hour (3 to 5 kilometers a second), which rockets them to the outer reaches of the cluster." <br /><br />Richer suggested that white dwarfs propel themselves by ejecting mass, like rockets do. Before stars evolve into white dwarfs, they swell up and become red giants. Red giant stars lose about half their mass by shedding it into space. If more of this mass is ejected in one direction, it could propel the emerging white dwarf through space, just as exhaust from a rocket engine thrusts the rocket from the launch pad, Richer proposed. <br /><br />Observations of some planetary nebulae display similarly directed outflows. (Planetary nebulae are the glowing material ejected by red giant stars.) The jets in those planetary nebulae are shown to flow in opposite directions. If they are not perfectly balanced, Richer reasoned, the stronger jet could accelerate

 

[ashish27]

cosmic soccer! im trying to find more about this story....

 

[thebigcat]

More like cosmic pool, but that would be Red Dwarf. <div class="Discussion_UserSignature"> </div>

 

[alokmohan]

Too many dwarfs.White dwarf of of Indian origin,as Chandra sekhar was I ndia born.

 

[3488]

Thank you alokmohan,<br /><br />this is VERY interesting indeed, not only that the possibilty of hundreds of thousands of<br />White Dwarfs roaming the intersteller 'hood', but also the finding of super hot, new White Dwarfs,<br />so hot that really they are 'Blue Dwarfs'.<br /><br />This is well worth following up.<br /><br />Spaceflightnow article.<br /><br />Andrew Brown. <div class="Discussion_UserSignature"> <p><font color="#000080">"I suddenly noticed an anomaly to the left of Io, just off the rim of that world. It was extremely large with respect to the overall size of Io and crescent shaped. It seemed unbelievable that something that big had not been visible before".</font> <em><strong><font color="#000000">Linda Morabito </font></strong><font color="#800000">on discovering that the Jupiter moon Io was volcanically active. Friday 9th March 1979.</font></em></p><p><font size="1" color="#000080">http://www.launchphotography.com/</font><br /><br /><font size="1" color="#000080">http://anthmartian.googlepages.com/thisislandearth</font></p><p><font size="1" color="#000080">http://web.me.com/meridianijournal</font></p> </div>

 

[alokmohan]

The whole concept starts from electron degeneration.The year wasi928:the place ,sothwest India,the city of Madras on bay of Bengal.There at the University of Madra ,a seventeen year old Indian boy named Subramanyan Chandra sekhar was immersed in the study of physics.,chemistry and mathematics.Chandrasekhar was tall and handsome,with regal bearing andpride in his academic achievements.He had recently read Arnold Sommerfields classic text book Atomic structure and spectral outlines and was now overjoyed that Smmerfield ,one of the worlds greatest theoritical physicists had come from his home in Munich to visit madras. Eager for persnal contact ,Chandrasekhar wnt to and asked for an interview .Sommerfield granted an appointment several days hence. On the ay of his appointment Chandrasekhar ,filled with pride and confidnce in his mastery of modern physics ,walked upto Sommerfield hostel room and knocked on the door .Sommerfield greeted him politely ,inquired about his studies ,then deflated him."The physics you have been studying is a thing of the past.Physics has all changed in the five years since my book was written.",he explaind He went to describe REVOLUTION IN PHYSICISTS UNDERSTANDING OF THE that govern therealm of the small,the realm of atoms,molecules,electrons and protons.In this realm ,the Newtonian laws had been found to fail in ways that relativity had not anticipated.Their replacement was a radically new set of physical laws that were clled quanum mechanics because thhey deal with the behaviour of the particles of matter.quanta.Thogh only two years old the new quantum mechanical laws were already having a grat success in explaing how atoms molecules behave. When they partedSom