On Monday, Nov. 11, 20199, Mercury will appear to pass across the disk of the sun as seen from Earth. This event -- which astronomers call a transit -- helped early astronomers measure distances in the solar system.
Mercury Transit 2019: The Astronomical History of This Rare Celestial Event
SPACE.com - 10 Nov 2019 17:10
On Monday, Nov. 11, 20199, Mercury will appear to pass across the disk of the sun as seen from Earth. This event -- which astronomers call a transit -- helped early astronomers measure distances in the solar system.
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