Neil deGrasse Tyson

@neiltyson ↗

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Last Checked June 14, 2020

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Sun Mar 29 16:05:40 +0000 2020

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Neil deGrasse Tyson @neiltyson

Ignoring the Kessel Run abomination in Star Wars, a Parsec is an obscure unit of distance in classical astronomy equal to 3.26 light years. A megaparsec is a million of these. So for every megaparsec, the universe is expanding an additional 70 km/sec — the famous Hubble Constant. https://t.co/OKyzlNCESY — PolitiTweet.org

Posted March 29, 2020

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Neil deGrasse Tyson @neiltyson

Nothing to tweet today, except for all those who wanted more space, the Universe continues to expand at about 70 kilometers per second, per Megaparsec. — PolitiTweet.org

Posted March 29, 2020

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Neil deGrasse Tyson @neiltyson

If you must know: The word parsec is a contraction of “parallax-second”, the distance a star would be from the Sun if one half of its parallax angle subtended one second of arc. — PolitiTweet.org

Posted March 29, 2020