The green comet, also known as Comet 2022 E3 (ZTF), has been making headlines as it passes by Mars in the night sky. Discovered just 11 months ago, this comet is estimated to have a solar orbit of 50,000 years — meaning that we are the first humans to see it, and we may be the last!

The green comet is an especially good classroom topic for a number of reasons:

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