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Vera Rubin - In a spiral galaxy, the ratio of dark-to...

In a spiral galaxy, the ratio of dark-to-light matter is about a factor of ten. That's probably a good number for the ratio of our ignorance to knowledge. We're out of kindergarten, but only in about third grade. (Vera Rubin)

In a spiral galaxy, the ratio of dark-to-light matter is about a factor of ten. That's probably a good number for the ratio of our ignorance to knowledge. We're out of kindergarten, but only in about third grade.

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factor galaxy good grade ignorance kindergarten knowledge matter number ratio spiral ten third

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