Nebula
Orion Nebula M42
Visible to the naked eye as a smudge in Orion's sword.
Free stargazing sky map
The night sky,
in all its beauty.
SkyLumi is a free sky map and planetarium for iPhone, Android and the web. Explore a photographic map of the night sky, then use a guide or your own sky to work out what you are seeing.
One continuous universe
Galaxies should
look like galaxies.
Most stargazing apps look like technical diagrams. SkyLumi renders the night sky photographically, as if even the faintest nebula were lit from within.
The enhanced imagery relies on the Pan-STARRS, SkyMapper and DSS2 surveys, served as HiPS by CDS Strasbourg (credits).
Seamless deep zoom
Zoom from the whole sky into deep space.
Deep-sky imagery lives directly inside the map. Every pinch reveals more detail without opening a separate gallery, losing your place, or leaving the sky behind.
One map. One universe. One journey.
Every frame starts as real observatory photography. We brighten it, balance the colour, and in places rebuild a blown-out core, so it looks like the thing you would see through a very good telescope. It is an instrument for wonder, not for science.
Wide sky
Tonight, from where you are
The best of tonight,
already picked.
Open the map to see what is above you, then check the real sky before you set out.
Galaxy
Andromeda M31
The furthest thing most people can see unaided.
Open cluster
Pleiades M45
Six stars by eye, dozens through binoculars.
Globular cluster
Hercules Cluster M13
Hundreds of thousands of stars in one ball.
Planetary nebula
Ring Nebula M57
A dying star's cast-off shell, seen face on.
SkyLumi lists objects above your horizon at the selected time. The list changes through the night and year. The five shown are examples.
Aim mode and AR
Point up.
Find it.
Tap Aim and hold your phone to the sky. Real motion sensors and your compass move the map as you do. That bright dot over the rooftops? Use the map and nearby stars to compare it with your sky.
Open AR to place the sky map over your camera view. It includes the ISS and Starlink satellites from live orbital data. Sensors, a clear view, location, and time affect alignment.
Phone feature
Your stargazing guide
Meet Lumi.
A voice guide you can ask what is worth seeing, where to look, or what makes something extraordinary. It moves the map and takes you there, rather than just talking about it. Lumi is live in the browser today.
- What are the most amazing things I can see tonight?
- Show me something my kids will love.
- Show me something I'd never think to look for.
Made for curious minds
For looking up,
not looking things up.
SkyLumi is for first-time stargazers, families, and anyone with a few minutes to spare and a desire to be amazed.
Questions, answered
A few things to know.
Do I need a telescope?
No. SkyLumi is built for the naked eye first, and works just as well with binoculars or a telescope if you have them. The photographic zoom shows you far more than your eye can — the sky's own photography, brought to your screen.
Does it work in a city?
Yes. Bright stars, the planets, the Moon and ISS passes are all visible from a city, and SkyLumi shows you where to look for each of them.
Is it good for a beginner?
Yes — that is who it is for. Plain language, no jargon, and a view that matches what is actually over your head rather than a chart you have to learn to read first.
Can I use it in a browser?
Yes — open it here, in any modern browser. Phone-specific features like aim mode and camera AR need the sensors in a phone, so they are at their best on one.
Does it work offline?
Partly. The core sky — stars, constellations and the bundled views — works with no signal. The high-resolution survey imagery streams as you zoom, and live satellite positions need a connection.
The Sky Library
Start with something you noticed.
Identify it
What is that bright light?
A planet, a star or a passing satellite? Follow the clues.
Read the guide
Plan a look
Which planets are up?
Check their height and direction for a place and time.
Use the checker
Understand the picture
Are those colors real?
Read a space photograph with its wavelengths and credit in view.
Explore the answer
Look up
There is something incredible above you tonight.
SkyLumi helps you find it, see it, and understand why it is extraordinary.