Astronomer
Astronomer
For astronomers, stargazers and night photographers
Point your phone at the sky to name every star and planet, see what to watch tonight and whether the clouds will let you, never miss an eclipse, a meteor shower or the aurora, catch the golden hour and set up your telescope in a minute.
Free, with a discreet banner. Astronomer Plus: €5.99, once, no subscription.
The map follows your phone: every star, planet, constellation and nebula is named where you look, in real time.
What is up, from when to when, how dark the night will be, and the clouds hour by hour where you are.
Eclipses, full moons, meteor showers and the aurora come to you as notifications, at the right time for your place.
Sky map
A live map of the whole sky drawn on your phone: hold it up and it follows the gyroscope and the compass, or slide through it with a finger.
Tonight
The planets and the Moon with their rise and set times, the best objects of the night, the hours of real darkness, and the forecast that matters to observers.
Events
Eclipses, full moons and supermoons, the blue moon, meteor showers, oppositions, conjunctions of the planets, the Moon passing by a bright star: the calendar of the year, with what you will see from where you are.
Aurora
The planetary K-index, the solar wind and NOAA’s forecast of the auroral oval, turned into one figure: your chance of seeing the aurora, overhead or low on the horizon.
Photography
Sunrise and sunset, the golden and blue hours, the twilights, moonrise and moonset, with the direction of the Sun and the Moon for your framing.
Telescope
Everything a GoTo hand controller asks for, in the format of your mount: latitude and longitude, elevation, time zone and daylight saving time, date and time, sidereal time.
Observation mode
One tap turns the whole app red on black, dims the screen and keeps it awake: your eyes stay adapted to the dark while you observe.
Free or Plus Astronomer Plus
The sky map, tonight, the events and the telescope are free. Astronomer Plus is one purchase, for life, to go further and support an independent app.
Free
with a discreet banner
€5.99
once, for life, no subscription
Prices with tax in the euro area; your store shows the price in your currency. The purchase follows your store account: restore it on a new phone in Settings.
Astronomer needs no account, no email and no password. The positions of the stars, the planets, the Sun and the Moon are computed on your phone; what leaves it is rounded first.
Yes: the sky map, tonight, the events and their notifications, the golden hour and the telescope’s settings are free, with a small banner. Astronomer Plus (€5.99, once) removes the ads and adds the aurora alerts, the camera finder, the planners, any date and more sites.
Yes. The stars, the planets, the Sun and the Moon are computed on your phone: the map, tonight’s objects and the sun times work offline. The forecast, the aurora and new events need a connection.
Astronomer gives what any mount asks for, with presets for the Sky-Watcher SynScan, Celestron NexStar, Meade AutoStar and iOptron controllers. It does not drive the mount: you type the values in, or read them off when you align.
A red-on-black theme for the whole app, with the screen dimmed, so that your eyes stay adapted to the dark. In the free version it can be turned on between sunset and sunrise; with Astronomer Plus, at any time.
Only on the screen. Never look at the Sun directly, nor through binoculars, a telescope or a camera viewfinder, without a certified solar filter: it causes permanent eye damage in an instant.
More answers on the help page.
Astronomer is coming to Android and iPhone.