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Asteroid 2021 SG came from the sun’s direction – EarthSky

Asteroid 2021 SG – 4 times the diameter of 2013’s Chelyabinsk meteor – passed Earth without being previously detected on

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This illustration shows asteroid 2021 SG’s location just 24 hours before its closest approach to Earth on September 16, 2021. It was close to the sun’s direction in our sky. So astronomers didn’t spot it until September 17, the day after its closest approach….

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