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| Earth-trailing orbit (Spitzer was placed into a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical units per year (an "Earth-trailing" orbit). AllaR) | |||
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| Earth-trailing orbit (Spitzer was placed into a heliocentric instead of geocentric orbit, trailing and drifting away from Earth's orbit at approximately 0.1 astronomical units per year (an "Earth-trailing" orbit). AllaR) | |||