megaparsec การใช้

• One megaparsec is 3.26 million light-years.
• A megaparsec is 3.26 million light-years.
• One megaparsec equals 3.26 million light-years.
• Advanced LIGO detector should be able to detect these events up to 200 megaparsec away.
• This measure enabled astronomers to calculate that the universe is expanding at the rate of 80 kilometers a second per megaparsec.
• The universe, the team concluded, was expanding at a rate of 72 kilometers per second per megaparsec ( 3.26 million light-years ) of distance.
• That would mean that there is an increase in the recessional speed of 57 kilometers per second for every megaparsec of distance from Earth ( or any other observer position ).
• A megaparsec is 3.26 million light-years ( a light-year is the distance light can travel in one year, about 5.88 trillion miles .)
• By the 1980s, at least four intergalactic dust clouds were discovered within several megaparsec ( Mpc ) of the Milky Way galaxy, and an example of this is the Okroy cloud.
• At this time, evidence was already accumulating that supermassive black holes were found at the center of large galaxies, which are distributed approximately on the order of a megaparsec apart from each other.
• As of 2008, the best constraints for the supermassive black hole mass per cubic megaparsec in the local universe derived from the SoB
  tan argument is between 2-5 x 10 5 solar masses.
• In one of the first bouts, Wendy Freedman of the Carnegie Observatories in Pasadena, California, announced her current estimate of the Hubble constant _ 70, give or take 10, kilometers per second per megaparsec.
• So for every megaparsec, every 3.26 million light-years, that a galaxy is from Earth, it will be seen to recede by 80 kilometers per second, or about 60, 000 miles per hour.
• That means that a galaxy appears to be flying away at a rate of 70 kilometers per second per megaparsec, or 160, 000 miles per hour faster for every 3.26 million light-years away from Earth.
• The largest radio galaxies have lobes or plumes extending to megaparsec scales ( more in the case of giant radio galaxies like 3C236 ), implying a timescale for growth of the order of tens to hundreds of millions of years.
• That means that a galaxy appears to be flying away at a rate of 70 kilometers per second per megaparsec, or 160, 000 miles per hour faster for every 3.26 light-years it is away from Earth.
• It is 70 kilometers per second per megaparsec _ that is, 160, 000 miles per hour faster for every 3.26 million light-years of distance from Earth, not for every 3.26 light-years.
• That's an unprecedented precision, considering that past calculations have varied from as slow as 50 to as fast as 100 kilometers per second for every 3.3 light-years of distance _ a distance known in cosmology as a megaparsec.
• For example, he said, the Hubble parameter ( expressed on the plaque as H ( EQ ) 70km / s / Mpc ), is the expansion rate of the universe : 70 kilometers per second, over a distance of one megaparsec.
• A research team led by Dr . Mario Hamuy and Dr . Mark Phillips, astronomers at the Cerro Tololo Inter-American Observatory in Chile, said their measurements of 25 supernovas had yielded an expansion rate of 60 to 70 kilometers per second per megaparsec.