megaparsec


Also found in: Dictionary, Wikipedia.

megaparsec

[‚meg·ə′pär‚sek]
(astronomy)
A unit equal to 1,000,000 parsecs.
References in periodicals archive ?
The Baryon Oscillation Spectroscopic Survey also reported that the universe is expanding at 67 km/s per megaparsec, with an error of 1.
26 million light-years, then we'll stick with megaparsec as the record-holder.
6 miles per second per megaparsec - much lower than previous estimates.
Before the space telescope, astronomers only knew that the Hubble parameter -- a measure of the current expansion rate--was somewhere between 50 and 100 km/s per megaparsec (a parsec is about 3.
7 billion years and an expansion rate of 71 kilometers per second per megaparsec.
Using four different ways to measure distances in the cosmos, the astronomers find a Hubble constant of 70 kilometers per second per megaparsec.
At the meeting, Freedman reported a Hubble constant of about 73 kilometers per second per megaparsec, which corresponds to a universe between 9 and 12 billion years old.
Applying this calibration to the elliptical galaxies in the Coma cluster, the team found a distance of about 345 million light-years and a Hubble constant between 61 and 77 kilometers per second per megaparsec (1 parsec is 3.
About all they could tell for certain was that the cosmic expansion rate--the "Hubble constant"--was somewhere between 50 and 100 kilometers per second per megaparsec.
From this measurement, they calculated a Hubble constant of 80 kilometers per second per megaparsec.
Combined with findings from their previous studies of 13 similar objects, these results show that the Hubble constant has a value ranging from 67 to 79 kilometers per second per megaparsec.
The Hubble constant, a key factor in determining the age of the universe, had been shrinking continuously since 1936 when Edwin Hubble adopted 526 km per second per megaparsec.