Astronomy
Free astronomy — 14 tools · 14 tools
Celestia
Open-source 3D space simulation that lets you travel through the universe
Google Sky
Explore the universe in your browser
In-The-Sky org
Interactive night sky guide with planet positions, eclipses, and events calendars
Kepler gl Astronomy
Visualize spatial and astronomy data
KStars
Open-source planetarium program with an accurate night-sky simulation for KDE
Moon Phase Calculator
Find moon phases for any date and location
NASA Eyes
Visualize planets, spacecraft, and the universe
Nova Astrometry
Open-source astrometry.net service that identifies objects in star-field images
Sky Chart
Free open-source planetarium software showing the sky from any location and date
Sky Map
Point your phone to identify stars and planets
Space X Launch Tracker
Track upcoming and past space launches
Stellarium
Free open-source planetarium for your computer
Sunrise Sunset Calculator
Find sunrise, sunset, and daylight hours
World Wide Telescope
Free web-based astronomy visualization environment from the American Astronomical Society