Moons of Jupiter and Saturn

Contains adsIn-app purchases
4.0
207 reviews
Content rating
Everyone
10K+
Downloads
Content rating
Everyone
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About this app

This app is an astronomical journey, offering detailed predictions and interactive experiences focusing on the moons of Jupiter and Saturn. Ideal for stargazers, students, and space enthusiasts, it brings the wonders of our Solar System to your Android device.

Key Features:

Jupiter's Moons
-Real-time Moon Positions: View current positions of Jupiter's moons.
-Event Predictions: Stay informed about moon occultations, eclipses, transits, and the shadow transits.
-Red Spot Transit: Track the transit of the Great Red Spot.

Saturn's Moon
-Moon Positions: Monitor Saturn’s moons as they orbit the planet.
-Ring Angle Visibility: Observe changes in Saturn's ring angles.

Interactive and User-Friendly Interface:
-Enjoy stunning graphics and an easy-to-navigate design. Access detailed information and timings for celestial events.
Updated on
Jan 14, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit

Ratings and reviews

4.1
185 reviews
Mark Pacini
March 9, 2024
I loved it and used it often before the Saturn update was added. Now, it is much more difficult to see the shadow transit times in the future. Why did you remove the time forward arrow and leave the time backward arrow? If you only had one, the forward arrow is much more useful. I would pick a viewing time and advance the time by 24 hrs. And keep going to eventually determine when to go out for a transit viewing. Much more difficult now.
2 people found this review helpful
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A Google user
August 10, 2019
This is a very easy-to-use app with a simple display that clearly shows you the current and future positions of Jupiter's Galilean moons. It also has the option to show the moons' positions mirrored and/or upside-down, which is great for telescopes. This app would be perfect for me if there was some way to change the time zone. I am in AEST, but the time shown is in UTC, and so is very different from my time. Please provide an option to change the time zone of the time displayed. Thank you.
20 people found this review helpful
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Andrew Farm
October 29, 2025
I love this app! In addition to identifying the moons, I use it to plan ahead for interesting moon events. I have just a couple of issues with it: 1. In the lower section of the page, you can scroll horizontally but not vertically (the time axis). Please allow this, it would make selecting the time much easier! 2. The shadows of the moons are shown in Direct View orientation but not in Mirror Reversed or Inverted View (bug?) I recommended this app for anyone interested in observing Jupiter!
3 people found this review helpful
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What’s new

-New Top View to explore moons from a new perspective
-Grid overlays added to views for better orientation
-Full Android 16 support
-Library updates and performance improvements