CosmAtlas is a powerful Milky Way simulator for iPhone and iPad devices, which applies real physics to calculate every single celestial body position at any time between the year 0 to year 9999.

With this educational App you'll be able to navigate across the astronomical distances in our cosmos, land on the major planets and satellites and see the sky from there or read about it.

Main Features

- More than 400 Solar System bodies, including:
- The 8 major planets;
-177 Solar System natural satellites;
- 295 comets (including the legendary Halley's Comet);
- 11 dwarf planets (including Pluto);
- 3 major asteroid groups: Asteroid Belt, Kuiper Belt, Oort Cloud;
- 1449 nearby bright stars;
- The 88 modern constellations;
- Real physics (celestial mechanics) on the objects positioning in relation of time;
- See the sky from the surface of the major planets/dwarf planets, the sun and major satellites;
- A few terrestrial planets and satellites will have an approximate terrain if your on the surface;
- Atmospheric effects also tuned to the reality (that includes twilight sky colours).

Six languages available to maximise the educational reach:
- English;
- Spanish;
- Portuguese;
- Italian;
- French;
- German;

What’s New

Version 1.1

This app has been updated by Apple to use the latest Apple signing certificate.

Performance improvements and compatibility fixes for iOS 8.1+.

Ratings and Reviews

4.0 out of 5
12 Ratings

12 Ratings

SF Presidio ,

Please update this good app

The good news about this app is that it’s free. As other users have noted this is a good astronomy application. They also stated that it crashes too often and needs updating. This is still true. The support link and developer website are both broken. Please update this application to the current IOS and keep it current. It is very useful and it would be a shame to loose it.

BohdiTree ,

Cool but abandoned

It’s cool but it keeps crashing. The developer hasn’t updated it in years which is almost certainty why it crashes.

I hope it gets fixed but considering the large amount of memory it uses I will have to delete it for now.

Yinyanh ,

Nice 3D navigation

I like the navigation and the view of 3D rotation, low resolution is fine, hope with a update solve few things.
Thank for developing this app.

App Privacy

The developer, Aurelio Calegari, has not provided details about its privacy practices and handling of data to Apple.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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