Observing Basics: What Messier missed

Observing Basics: What Messier missed

NGC 4565, the Needle Galaxy, was imaged with a ZWO ASI294MC Pro on a Takahashi FSQ-106N with 18 hours and 50 minutes of exposure. Credit: Molly Wakeling In 1781, French astronomer Charles Messier published a catalog of 103 objects in the heavens. He was primarily...
Secret Sky: Tropical Novaya Zemlya effects

Secret Sky: Tropical Novaya Zemlya effects

Back to Article List Now you see me, now you don’t. During the dry season at Botswana’s Makgadikgadi salt pan, temperature inversions lead to all manner of mirages. Credit: Stephen James O’Meara Any reference will tell you the Novaya Zemlya effect is a polar mirage —...