Comet C/2013 A1, also known as comet Siding Spring, will graze the planet Mars on Sunday within about 139,500 km, less than half the earth-moon distance. Spacecraft orbiting around mars are getting prepped for the encounter.
Comet C/2013 A1, also known as comet Siding Spring, will graze the planet Mars on Sunday within about 139,500 km, less than half the earth-moon distance. Spacecraft orbiting around mars are getting prepped for the encounter.
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