ATLAS Tonight's Sky
Education
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
ATLAS answers one question: what is actually worth imaging from your backyard tonight?
Tell it where you are, and it scores every deep sky object above your horizon by weighing the six factors that decide whether a target is worth the night: altitude, separation from the moon, moon illumination, sky brightness at your site, how long it stays inside your imaging window, and where it sits in its season.
You get a ranked answer in seconds, instead of an hour across three apps and a weather site.
WHAT IS INSIDE
Tonight's Best
A ranked list of targets scored for your location, your date and the forecast. Open any object to see its altitude curve, transit time, angular size, magnitude, and a plain reading of why it scored the way it did.
An interactive 3D sky
Messier, NGC, IC, Caldwell and Sharpless on a dome you can spin, zoom and scrub through time, forward or back by years. Search any designation or common name, fly to it, and see when it is highest.
Conditions
Hourly cloud cover and temperature for your exact coordinates, plus moon phase, moonrise and moonset, and every stage of twilight.
Gear aware framing
Enter your telescope, reducer and camera and ATLAS frames each target the way your rig will see it. Drag and twist the frame on the sky, then send it to NINA with its position angle.
PLAN A YEAR AHEAD
The imaging planner answers the question that decides a project: when can I shoot this, and for how long. Pick a target and ATLAS works out every night of the next twelve months from your location, your horizon and your gear: which nights are worth it, how many usable hours each one gives you, and which months carry the season. It is sky geometry, not a forecast.
POINT AT THE SKY
Raise your phone and the map follows it, with your camera's view behind it if you want the real horizon. Nothing to set up: ATLAS finds north when Point mode opens and then follows the phone, so the map holds steady even near a building or a steel railing. If it ever looks off, center the Moon and tap it, and it corrects.
BUILT FROM A LIGHT POLLUTED ROOFTOP
ATLAS was built by an astrophotographer in Chicago who has put over 750 hours of integration on deep sky objects from a Bortle 9 rooftop. The scoring is tuned for exactly that: real skies, real obstructions, a real moon in the way, not a perfect night at 8,000 feet.
You do not need dark skies or expensive gear to do serious astrophotography. You do need to spend your clear nights on the right target. That is what this is for.
FREE, AND STILL FREE
ATLAS is free to use, with no account required. Tonight's best targets, the 3D sky and dome, Point mode, conditions, search and framing all stay free, and there are no ads and no full screen upsell screens.
Astronomer is an optional subscription for planning ahead and going deeper: the twelve month imaging planner, Universe view, mosaics, the fainter NGC, IC and Sharpless objects, and the advanced filters. It lives in one place in the menu, and nothing asks you twice.
DATA AND CREDITS
Star data from the HYG Database v3.8 (CC BY-SA 2.5), compiled by David Nash. Deep sky data from OpenNGC v2024.02 (CC BY-SA 4.0), compiled by Mattia Verga. Solar system positions, twilight and moon phase from astronomy-engine. Weather from Open-Meteo. Place names from OpenStreetMap and Nominatim.
Made by M102 Astro. m102astro.com
ATLAS Astronomer is an auto-renewing subscription.
Monthly: $3.99 per month.
Yearly: $29.99 per year. New subscribers pay $19.99 for the first year.
Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of the period. You can manage or cancel your subscription in your Apple Account settings after purchase.
Terms of Use: https://atlas.m102astro.com/terms
Privacy Policy: https://atlas.m102astro.com/privacy
Conditions has a new hour by hour view: the sky, cloud by layer and the chance of rain through the night, with the clear window now counting rain. Astronomer adds transparency and separate narrowband and broadband calls.
The developer, M102 Astro, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Purchases
- Location
- Contact Info
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- M102 Astro LLC
- Size
- 33.7 MB
- Category
- Education
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Astronomer Annual $29.99
- Astronomer Monthly $3.99
- Copyright
- © 2026 M102 Astro LLC
