2006-11-03 07:17:04 · 6 answers · asked by Mr. Owl 3 in Science & Mathematics ➔ Astronomy & Space
A quasar discovered in 2003, in the constellation Ursa Major, with a redshift of 6.4 (the highest yet found) which emitted its light when the universe was only 800 million years old, and the light has been travelling for almost 13 billion years. hence it is almost 13 billion light years away.
Hubble's Law (first formulated by Edwin Hubble and Milton Humason in 1929 after nearly a decade of observations) states that the redshift of a far-off stellar object is proportional to the distance away it is. The bigger the redshift, the further the object.
Having got accurate spectroscopic readings of the shift in the hydrogen and helium lines in its spectrum, it is a simple matter of multiplying by Hubble's constant to calculate the distance.
The most recent calculation of the constant, using the satellite WMAP began in 2003, yielding a value of 71±4 (km/s)/Megaparsec. As of the 2006 data, that figure has been refined to 70 (km/s)/Megaparsec, +2.4/-3.2.
The first link tells you the story of the quasar's discovery by the Sloan Digital Sky Survey and shows you a photograph of it: (the red dot in the middle of the picture).
2006-11-03 14:00:42 · answer #1 · answered by Anonymous · 13⤊ 0⤋
no person is familiar with for specific how enormous the universe is. on an analogous time as a great area of the universe has been spoke of, scientists have not, and could in all probability never, locate the "fringe of the universe". maximum scientists advise "observable universe," while they consult with "The Universe." it is likewise no longer a threat to pinpoint a particular "area" of the great Bang. because of the fact, even although this would not look to make any experience, there is not any midsection of the universe. of direction, if we are pertaining to the "observable universe," then you certainly, everywhere you take place to be, are on the midsection of the universe. To confuse concerns extra, we aren't even one hundred% specific that a huge Bang got here approximately in any respect. There are different theories with reference to the origins of the universe. the great Bang concept is basically the main extensively customary via the smart those that gets a commission to contemplate those issues.
2016-10-15 08:26:31 · answer #2 · answered by tiemeyer 4 · 0⤊ 0⤋
No one knows for sure. Gamma Ray Burst GRB050904: http://www.nasa.gov/vision/universe/starsgalaxies/2005_distant_grb.html
was determined to be 12.8 billion light years away. It has a red-shift of 6.29, which is the largest, hence, farthest. However, since the universe is expanding, the actual distance might be much farther than that:
http://www.space.com/scienceastronomy/mystery_monday_040524.html
2006-11-03 08:07:27 · answer #3 · answered by arbiter007 6 · 2⤊ 0⤋
Your question cannot be answered as there are no means of exploring that far away into space. If you meant the one farthest away from Earth, which is also known, then that would be a different question and thus would have a different answer...hehehe
2006-11-03 07:22:18 · answer #4 · answered by Quetzalcotl 1 · 0⤊ 2⤋
One that we haven't found yet, and probably never will.
Oh, you mean that we know of? Don't know and don't care. Sorry! Too many of them out there for me to worry about.
2006-11-03 07:18:38 · answer #5 · answered by pianoman.jeremy 4 · 0⤊ 2⤋
Um..they're infinitely far away and no one knows what they are.
2006-11-03 07:18:24 · answer #6 · answered by Jethro 5 · 1⤊ 0⤋