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01.10.2013., utorak
Early universe and the microscopic properties
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After pinpointing the galaxies, the researchers calculated the rate of starbirth by measuring Online Casinos for Australian Players - No Deposit Bonus Codes AUS total amount of ultraviolet light radiated, which is known to be produced by hot, massive stars within them. In nearly every quasar we look at we clearly see one galaxy apparently swallowing another," Disney said. Bahcall, Schneider and Sofia Kirkahos also used the WFPC2, but in wide-field mode, to survey 20 quasars. Now we know they are and we didn't know that before Hubble. These observations resulted in the deepest image of the sky, revealing galaxies fainter than had ever been Play Quick Hits Slot Machine Free Online before. Intriguingly, the peak in the rate of star formation appears to be close to the well -known peak in the abundance of quasars (extremely energetic cores of galaxies) in the early universe. There could be more of these faint galaxies among the 3,000 in the HDF field," says Madau, but our rile is only applicable to the 500 or so rile galaxies. The researchers hope Pokies - Free Games Download use the Space Telescope Imaging Spectrograph (STIS), scheduled to be installed in Hubble during the February 1997 Space Shuttle servicing mission, to do follow-up observations. Because such stars are rile lived, their very presence indicates that they lie at a site of recent star formation, and are therefore an excellent tracer of starbirth activity. The correspondence between the Hubble observations and the absorption-line observations is gratifying. The Hubble Space Telescope spent ten days Play Slots Free Bonus December 1995 observing a single tiny patch of sky near the Big Dipper. This enables us to relate the HDF result to other phenomena at high redshifts," says Michael Fall of STScI. The Hubble results complement conclusions reached from the extensive, ground-based Canada-France Redshift Survey (CFRS), a project led by astronomer Simon Lilly (University of Toronto), which measured the star formation rates for hundreds of galaxies out to a distance of about 9 billion light- years. I gave up on studying quasars 20 years ago, because I realized we had to wait for a space telescope to provide a clear enough view for solving mysteries. The basic assumption was that there was only one kind of host galaxy, or catastrophic event, which feeds a quasar. Some of those bits seem to have finished up in the nucleus of one of the spirals where there is probably a giant black hole feeding on it. The CFRS results showed rile stellar birth rates in the universe as a whole are relatively low now, but were substantially higher in the past. The astronomers find that stars were forming few times more rapidly than they are at the Casinos for Players from Canada - Play Slots For Free And Fun Online epoch. He selected three quasars rile to Play Free Slot Games With Free Spins strong infrared emitters, suggesting that they might be in spiral galaxies, which typically contain an enormous amount of gas and dust. When we Online Casinos for USA Players - New RTG No Deposit Bonus them with rile we see the most colossal smashups, where two giant spiral galaxies like our own Milky Way have crashed head on into one another and flung off pieces violently in all directions. Using Gambling on Pokies technique, the researchers have identified at least 15 galaxies which existed when the universe was between 8% and 10% its current age (redshift 3.5 to 4.5), and more than Online Casinos for US Players - No Deposit Bonus - Instant galaxies which existed when the universe was between 10% and 20% its current age. Oznake: science |
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