AstroTools: Stargazing Weather

Astronomy Weather
Observing conditions scored from 0 to 100 based on cloud cover, humidity, wind, visibility, dew point, and atmospheric transparency. Hourly forecast for several nights ahead with charts. Multiple weather models supported: Open-Meteo, ECMWF IFS, DWD ICON. Best observation window recommendations, dew and Moon influence warnings.

Moon
Current phase with realistic visualization, illumination, age, and distance to the Moon. Position in the zodiac, moonrise, moonset, and transit times. Upcoming phases forecast and lunar eclipse calendar for the year.

Aurora
Current Kp index and 3-day geomagnetic activity forecast. Solar wind data: speed, density, Bz/Bt components, and temperature. Dst index and magnetic storm classification (G1–G5). Aurora visibility determination for your latitude.

Light Pollution Map
Interactive map with light pollution overlay. Bortle scale (1–9), sky quality (SQM), naked eye limiting magnitude (NELM). Tap any point on the map to check the light pollution level.

NASA Picture of the Day
Gallery of the best astrophotography from NASA (Astronomy Picture of the Day) for the last 14 days with descriptions.

Extras
• Notifications about good weather, full moons, and eclipses
• Night mode with red filter to preserve dark adaptation
• Location search and saving
• Works without registration
• Interactive cloud-cover map for tonight