Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Have you seen the green comets yet? Two icy visitors from ...
Two comets are going to reach their closest approach to Earth this week around the same time, and they promise to be spectacular. Comets are called C/2025 A4 (Lemmon), and C/2025 R2 (SWAN), according ...
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