Saturday, August 27, 2011



Selamat berpuasa di 26 Ramadan..


Lubang hitam telan bintang

LAKARAN artis menunjukkan aliran plasma yang keluar dari lubang hitam yang terletak empat bilion tahun cahaya dari Bumi.

PARIS - Satu fenomena luar biasa lubang hitam menelan dan menghancurkan satu bintang berjaya dirakamkan buat pertama kali oleh ahli-ahli astronomi, lapor majalah Nature kelmarin.
Kejadian luar biasa itu turut melibatkan aliran plasma yang mengalir keluar ke ruang raksasa pusat galaksi yang terletak hampir empat bilion tahun cahaya dari Bumi.
Kemusnahan bintang tersebut dikesan dengan menggunakan Teleskop Swift pada 25 Mac lalu selepas ia kelihatan berlegar-legar terlalu hampir dengan lubang hitam.
Kebanyakan galaksi mempunyai lubang hitam yang besar dan ia akan menyedut apa saja benda berhampirannya akibat tarikan graviti yang terlalu kuat. - Agensi

Black Hole Swallows Star, First Time Caught on Film [PHOTOS & VIDEO]

 Aug 25, 2011 10:16 AM EDT
For the first time, scientists have captured on film a black hole swallowing a star, using the Swift satellite.
This is the first time for scientists using the Swift satellite to view the process in its entirety, at the onset. Normally they are only able to snap photos of the aftermath, flares of ultraviolet and gamma rays that radiate for years during a star's consumption.
"Now we've seen the start of this event for the first time," David Burrows, of Pennsylvania State University, told
The Swift satellite caught an unusual view of bright gamma rays gusting from outside the galaxy in March from constellation Draco, which lasted for two days. The atypical views prompted a closer look by scientists.
"This was the first time we saw one of these big black holes going from quiet and silent to very loud and noisy, producing a lot of light and radiation," author Davide Lazzati of North Carolina State University said in a statement.
The flare originated from a relativistic jet directly after the black hold consumed the star, Swift J1644+57, most likely caused by a gravitational buildup estimated at one million times the mass of the sun.
This particular case is an unusual cosmic phenomenon, documented in the journal Nature, as the high-energy X-ray flares were 10,000 times brighter than scientists expected.
However, black holes are located in all large galaxies, frequently pulling at stars using gravity. A star is ripped apart by the pressure from the gravitational pull, heating to intense temperatures.
According to Burrows, it could take 3.9 billion years for the light emitted during the event from funnel-like jets to reach Earth, since one of the jets from this black hole was facing Earth.
"Incredibly, this source is still producing X-rays and may remain bright enough for Swift to observe into next year," Burrows told "It behaves unlike anything we've seen before."
Video watch on the top
his illustration steps through the events that scientists think likely resulted in Swift J1644+57.
This still from a NASA video animatino depicts how the black hole black holes, stars & galaxies, how black holes form, nasa swift spacecraft, x-ray astronomy, supermassive black holes Swift J1644+57 is eating a massive star, a process that scientists witnessed for the first time using the Swift satellite.

This is a visible-light image of GRB 110328A's host galaxy (arrow) taken on April 4 by the Hubble Space Telescope's Wide Field Camera 3. The galaxy is 3.8 billion light-years away.
All pictures Source: NASA/ESA/A. Fruchter (STScI)
Read/ Pic more>>source:
_______________Black hole swallow star..End


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