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すごい

すごい

Venus

Venus

Manhattan

Manhattan

Partial solar eclipse shot by NASA's Solar Dynamics Observatory.

Partial solar eclipse shot by NASA's Solar Dynamics Observatory.

F-15 and Space shuttle

F-15 and Space shuttle

How to view sunspots (and hopefully the Venus transit)

How to view sunspots (and hopefully the Venus transit)

eyecatch1

eyecatch1

#Venus. / Credit: Magellan Project, #JPL, #NASA. #space #astronomy

#Venus. / Credit: Magellan Project, #JPL, #NASA. #space #astronomy

Mt.rainier's shadow

Mt.rainier's shadow

Amazingly, a single day on Venus is longer than its entire year. It takes Venus 243 Earth days to completely rotate on its axis, but just 225 days to orbit the sun. Stranger still, Venus is one of two planets that rotates in reverse, a phenomenon called retrograde motion. Most theories attribute the reverse rotation to an ancient planetary collision.

Amazingly, a single day on Venus is longer than its entire year. It takes Venus 243 Earth days to completely rotate on its axis, but just 225 days to orbit the sun. Stranger still, Venus is one of two planets that rotates in reverse, a phenomenon called retrograde motion. Most theories attribute the reverse rotation to an ancient planetary collision.

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