04-06-2012 18:59 In the 18th century, astronomers believed that they could use the transit of Venus to answer one of the most pressing questions of the age: What is the size of the solar system? Elaine Quijano reports on the perilous quest hundreds of scientists took across the globe to record this rare occurrence.
Originally posted here:
CBS Evening News with Scott Pelley - Transit of Venus used as astronomical yardstick - Video
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