JupiterMoons is your essential guide to observing the king of planets whenever Jupiter reigns over the night sky.
Sky & Telescope’s app helps you locate Jupiter’s four largest moons and time transits of the Great Red Spot with an easy-to-use interface. (The moons’ orbits are shown to scale with respect to Jupiter.) Plus, learn more about what makes these fascinating solar system denizens tick.
Observe Jupiter
• Locate Io, Europa, Ganymede, and Callisto at the specified date and time — unlike in Galileo’s day, they’re clearly labeled.
• Zoom in by tapping on the screen to better watch accurately timed Great Red Spot crossings and moon transits and eclipses. Or zoom out for a full view of the moons’ orbits.
Take Command
• Use the time controls to step through the seconds or hours, or speed through days or even years to see where the moons will be down the line.
• Customize your view to match what you see through your telescope.
Focus on the Details
• Click on any item in JupiterMoons’ complete events calendar to see the action. The calendar lists all the Jupiter-related happenings for the day: moon eclipses and transits, Great Red Spot transits, and moon-shadow transits.
• Learn more about Jupiter and its ice-and-fire moons with our encyclopedic descriptions, accompanied by spectacular images.
Please note: this application is designed to work in landscape orientation only so that you may view Jupiter, the Great Red Spot, and the Galilean satellites at their best.
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User Rating
4 out of 5
1 ratings
in Ireland
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Reviews
Near ideal Jupiter's Moons app.
I have been using Sky and Telescope's Jupiter's Moons applet on my PC for some time now and found it very useful, so I was interested in getting this app for my iPad.
As a keen visual observer of the planets and in particular the moon and shadow transits of Jupiter, I like the much better proportional representation of the planet and its moons which is available with the zoom feature. The fast forward and reverse animation of the planets and its moons is a nice feature on this app, but it would be nice if one could enter a date and time directly rather than having to fast forward to the time of interest.
This is the only gripe I have with this app, so I can only give it a four- star rating for the present.
