NATIONAL  ·   June 5, 2012

Transit of Venus used as astronomical yardstick

- In the 18th century, astronomers believed that they could use the transit of Venus to try to figure out the the size of the solar system. ()

- In the 18th century, astronomers believed that they could use the transit of Venus to try to figure out the the size of the solar system. ()

Transit of Venus used as astronomical yardstick (2:01)

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