What is Stellarium Web?
Stellarium Web is the browser version of Stellarium, the well-known open-source planetarium software. It is run by Stellarium Labs and shows the sky the way you would see it with your eyes, binoculars or a small telescope.
The map opens on the sky above your location at the current time. You can drag to look around, zoom into planets and star clusters, and search for any object by name. Moving the clock forward or back lets you see where the Moon and planets will be tonight, or what the sky looked like on a past date.
Main Features
- Realistic star map that runs in the browser
- Search for stars, planets, galaxies and nebulae
- Change the date, time and location
- Constellation lines, names and artwork
- Atmosphere and landscape for a natural horizon view
- Red night mode to protect your dark-adapted eyes
How to Get Started with Stellarium Web
- Open stellarium-web.org and allow location access, or set your place by hand.
- Drag the sky to look around and scroll to zoom in.
- Use the search box to find an object, such as Jupiter or the Orion Nebula.
- Turn on constellation lines and art from the bottom toolbar, and change the time to see the sky move.
Stellarium Web Pricing
Stellarium Web is free to use with no account. Stellarium Labs also sells paid upgrades in its separate mobile apps, which are not needed for the web version.
Who Should Use It?
- Stargazers planning a night out
- Students and teachers studying astronomy
- Anyone curious about a bright star or planet they spotted
- Amateur astronomers checking object positions
- Parents showing kids the constellations
Stellarium Web Alternatives
- The Size of Space: compare objects across the universe
- If the Moon Were Only 1 Pixel: scroll through a to-scale solar system
- Space Elevator: ride up through the atmosphere into space
Frequently Asked Questions
Is Stellarium Web free?
Yes. The web planetarium is free and needs no account. Paid upgrades exist only in the separate Stellarium mobile apps.
Does Stellarium Web show my local sky?
Yes. It can use your device location, or you can pick a place on the map, and it shows the sky for that spot and time.
Can I see the sky on a different date?
Yes. Use the date and time controls to move forward or back and watch the sky change.