2 green comets shine bright. How to spot them in the night sky?

Two bright green comets, Comet Lemmon and Comet SWAN, are currently visible in the Northern Hemisphere after originating from the outer solar system. Comet Lemmon will have its closest approach to Earth around Tuesday, while Comet SWAN’s flyby occurred Monday and it is now dimming. Spotting both simultaneously without special equipment is a rare but notable celestial event.

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