Everything you need to know about reading the night sky, from checking tonight's conditions to understanding aurora forecasts.
Find out if tonight is good for stargazing at your location. Check cloud cover, moon phase, wind, humidity, and darkness window — scored 0–100.
See which planets are visible tonight from your location. Real-time altitude calculations for Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune.
Free stargazing forecast for any location worldwide. Cloud cover, moon phase, wind, humidity, and darkness scored 0–100 with a best viewing window.
Aurora forecast with Kp index, NOAA Ovation probability, and cloud cover. Check if the northern lights are visible tonight from your location.
How Clear Skys calculates the stargazing score: cloud layers, wind, humidity, rain, moon penalty, and observer profiles explained.