|
|
This is only a preview of the paper
Click here to register and get the full text.
Existing members click here to login
|
|
|
... Quasars have been studied since the early sixties when they were first discovered, yet many astronomers have different theories about what they are and where they came from. ... Astronomers know of approximately 12,000 quasars as of 2001. Such intensity seen on Earth despite their great distances indicates that they are very energetic (“Quasars and Active Galaxies”).
Quasars are approximately 10 to 15 billion light years from us. ... Most quasars that scientists study no longer exist and have died out. ...
Sea and Sky believes that in the early 1960s, quasars were referred to as radio stars because, when they were discovered, they seemed to be a strong source of radio waves. ... Since quasars have such a high red shift, they are extremely far away and are moving away from us at extremely high speeds. Some quasars are moving away from us at 80 percent the speed of light, which is 240,000 kilometers per second (Sea and Sky). ... Some quasars are believed to be producing 10 to 100 times more energy than our entire galaxy; they also shine brighter than 3 trillion suns. Most scientists and astronomers believe that quasars are probably powered by super giant black holes which are devouring entire stars. ...
David Aguilar and Christine Lafon infer from research by Wyithe and Loeb that since quasars are bright enough to be seen from billions of light years away, astronomers use them to study the early universe. ...
Lafon and Aguilar question a previous statement about black holes when Loeb and Wyithe discover that within the past few years, astronomers had found quasars at very high redshifts that existed when the universe was less than one billion years old.
Approximate Word count = 1302
Approximate Pages = 5.2
(250 words per page double spaced)
|
|
|
|
|
|