銀河Support
Get in touch
Astrelia is made by one person, so support is one inbox.
Write to me about anything: a bug, a star that looks wrong, or just to say the sky was pretty.
I read everything, and replies usually take a few days.
If something went wrong, these help:
- Your iPhone model and iOS version (Settings, then General, then About).
- The app version, printed at the bottom of Astrelia's Settings screen.
- What you were doing when it went wrong, and what you expected instead.
- A screenshot, if it's something you can see.
Questions
The stars are in the wrong place.
It's almost always the compass. Phone magnetometers are off by five to ten degrees on a good day, and worse near cars, speakers, magnetic cases and steel desks.
Aim the centre reticle at the Moon or a bright star you can name, then tap Align. Astrelia works out the offset and cancels it. That usually gets you under a degree.
The sky is empty and nothing moves.
Astrelia needs Location to know which sky is yours, and Motion to know where the phone is pointed. If either was declined, turn it back on in iOS Settings, under Astrelia.
If you would rather not share your location at all, set a home location in Astrelia's own settings and the sky is drawn for that spot instead.
Does it need the internet?
No. Every catalog ships inside the app and every position is computed on your phone. There is no account, no sign-in, nothing to sync, and no analytics.
It works in airplane mode.
The moon is a little off from another app.
Check whether the other app shows the geocentric position. Astrelia applies topocentric parallax for where you are standing, and atmospheric refraction near the horizon, so its moon sits where your eyes actually find it.
That can be up to a degree away from the simpler answer.
AR mode is black.
That's camera permission, in iOS Settings, under Astrelia. The camera image is only ever drawn on screen. Nothing is recorded, saved or sent anywhere.
On a simulator there is no camera and no compass, so sky mode shows a fixed synthetic view.
The galaxy map runs hot.
It's a real 3D renderer drawing about 109,000 stars, a whole galaxy and a black hole that bends light. Sky mode and Tonight are much lighter. Turning off the Milky Way backdrop in Astrelia's settings helps too.
A fact about a star looks wrong.
Tell me, and say which star and which number. The physical data comes from public catalogs: HYG, Messier and NGC, and the NASA Exoplanet Archive.
Some values are derived rather than measured, so mistakes are possible, and I would like to fix them. Every source is listed in the app under About, Sources.
Is there an iPad version?
It installs and runs on iPad. It was made for a phone held up at the sky, and an iPad layout isn't coming.
What happened to Citlali? Or Stellaria?
Same app, earlier names. It is Astrelia now, and the name is staying.
The boring parts
- Privacy, briefly
- Astrelia collects nothing. No account, no analytics, no tracking, no network calls at all. Your location and the way you point the phone are used on the device to draw the sky, and never leave it.
- Where the sky comes from
- HYG for stars, d3-celestial for the constellation lines, Messier and NGC for deep sky, the NASA Exoplanet Archive for the planets, and public domain or CC BY telescope photographs for the nebulae. Everything is credited by name under About, Sources.
- Ads and purchases
- It has no ads and no purchases, and isn't going to grow any. The code is open too: GPL-3.0, on GitHub (opens in a new tab).