Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun One million parsecs.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun astronomy A unit of distance equal to a
million parsecs
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
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Examples
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The expansion rate became known as the Hubble constant; Hubble thought it was 500 kilometers per second every 3.26 million light-years, that is, every megaparsec.
A Grand and Bold Thing Ann Finkbeiner 2010
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The expansion rate became known as the Hubble constant; Hubble thought it was 500 kilometers per second every 3.26 million light-years, that is, every megaparsec.
A Grand and Bold Thing Ann Finkbeiner 2010
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The expansion rate became known as the Hubble constant; Hubble thought it was 500 kilometers per second every 3.26 million light-years, that is, every megaparsec.
A Grand and Bold Thing Ann Finkbeiner 2010
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The expansion rate became known as the Hubble constant; Hubble thought it was 500 kilometers per second every 3.26 million light-years, that is, every megaparsec.
A Grand and Bold Thing Ann Finkbeiner 2010
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Therefore, since the curvature of the universe is essentially set by its expansion rate, the expansion rate of the universe determines how far away assuming special relativity works (which is typically as far as the expansion is negligible, so within a megaparsec or so, and also far away from any really dense objects, such as black holes or neutron stars).
Does Space Expand? Sean 2008
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The project I was running was designed to extract this information for all the galaxies in a many cubic megaparsec volume of the local Universe.
Well, That was Fun. Julianne 2007
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Currently, most astronomers agree that the value of the Hubble constant is about 71 kilometers per second per megaparsec a megaparsec is 3.2 million light-years.
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“As I said before, the number I came up with for the constant differs by .02 kilometers per second per megaparsec from the accepted value.”
Daedalus’s Children Dave Stern 2004
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“As I said before, the number I came up with for the constant differs by .02 kilometers per second per megaparsec from the accepted value.”
Daedalus’s Children Dave Stern 2004
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“As I said before, the number I came up with for the constant differs by .02 kilometers per second per megaparsec from the accepted value.”
Daedalus’s Children Dave Stern 2004
reesetee commented on the word megaparsec
The longest distance unit in common use, an astronomy unit equal to one million parsecs, 3.2616 million light years or 30.857 x 1018 kilometers (30.857 zettameters).
November 6, 2007