Re: I Link:- Physics: We Don't Get It, Either

Posted by DickT on December 29, 2003 at 19:21:11:

In Reply to: I Link:- Physics: We Don't Get It, Either posted by kx21 on December 29, 2003 at 05:47:38:

71 Km per second per megaparsec.

A megaparsec is a milion parsecs. A parsec is the measure of the distance at which the Earth's orbit would subtend 1 second of arc - hence parallax one second = parsec. In more familiar terms, a parsec is about 3.26 light years. So a megaparsec is 3,260,000 light years. The statement means that every megaparsec we look out, we see the unverse expanding at another 71 Km per second.

Science magazine is written for scientists. If Time's editors want to understand it they should do their homework.

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Follow Ups: (Reload page to see most recent)

• Re: I Link:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- kx21 12/30/03 (4)
  • Re: I Link:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- DickT 12/30/03 (1)
    • Took a bit:) -- sol 12/30/03 (0)
  • I Link:- Earth's Inconstant Magnetic Field ( 29 Dec. 2003/ NASA) -- kx21 12/30/03 (1)
    • Is this the Answer? -- sol 12/30/03 (0)
• GPx21k- SR&GR:- Physics: We Don't Get It, Either *** We ~ Physicists *** -- kx21 12/29/03 (0)

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