Header image: The bright planets, Venus and Jupiter, are close in the sky, nearby a bright Moon. Image taken on June 30, 2015. Composite image credit and copyright: Wang, Letian The two brightest planets and a once-in-a-lifetime comet are among the sky highlights of the shortest month of the year, February 2023. Here’s your stargazing […]

Header Image: Comet C/2022 E3 (ZTF) showing its green glow and three blue ion tails. Image Credit: Jose Francisco Hernández Everyone is talking about the “Green Comet”—aka Comet C/2022 E3 (ZTF)—right now! This cosmic fuzzball recently made its closest approach to the Sun, and has the potential to be bright enough to be seen from […]

Header Image: Comet C/2022 E3 (ZTF) showing its green glow and three blue ion tails. Image Credit: Jose Francisco Hernández Editor’s Note: Updated to include information about hyperbolic orbits. Comet C/2022 E3 (ZTF), informally called the “Green Comet”, recently made its closest approach to the Sun, after having traveled tens of thousands of years from […]