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For skywatchers with small telescopes, a striking green comet is visible in the night sky.
Comet Swan [image] has been an early morning comet but has now moved into the evening sky. The Big Dipper can serve as a guide to finding it.
According to SpaceWeather.com, Swan’s green color indicates it has a lot of the poisonous gas cyanogen and diatomic carbon. Whatever, just take a look if you can. Here is a map.
