iPhone app JupiterMoons download it using MyAndroid.

JupiterMoons is your essential guide to observing the king of planets whenever Jupiter reigns over the night sky.

Sky & Telescopes app helps you locate Jupiters 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 Galileos day, theyre 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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