DR.Orbit
Free
1.06for iPad
Age Rating
DR.Orbit Screenshots
About DR.Orbit
Demonstration of how a mass (e.g. earth) can orbit around a gravitational well (e.g. sun). Use your finger to push the mass onto a trajectory that results in a stable orbit around the well. Use the options menu to introduce some drag (good to get rid of the mass), to bring up some eye candy or to influence the movement of the mass by tilting your iPad.
Physics background:
Gravitational forces act between masses. In this demonstration a big stationary mass is situated in the center of the screen. Its location is fixed and it is hidden behind a cap. If you put a small mass onto the screen, it begins accelerating towards the big mass until it disappears under the cap "into the drain". You can prevent your mass from going down the drain by giving it an initial push. Try experimenting with the directions of your pushes. If it is done right, the small mass will be falling around the big mass without - in theory - ever disappearing into the drain. But due to the not very accurate numerical methods used for the calculation of the trajectory of the mass, the reality in this demonstration might be different. This also applies to the background grid on the screen: It does not show the correct wraping of space caused by the big mass in the middle of the screen. Its shape is a compromise between aesthetics and numerics.
Link to demonstration video:
http://www.youtube.com/watch?v=pwXI-EiZE4o
Physics background:
Gravitational forces act between masses. In this demonstration a big stationary mass is situated in the center of the screen. Its location is fixed and it is hidden behind a cap. If you put a small mass onto the screen, it begins accelerating towards the big mass until it disappears under the cap "into the drain". You can prevent your mass from going down the drain by giving it an initial push. Try experimenting with the directions of your pushes. If it is done right, the small mass will be falling around the big mass without - in theory - ever disappearing into the drain. But due to the not very accurate numerical methods used for the calculation of the trajectory of the mass, the reality in this demonstration might be different. This also applies to the background grid on the screen: It does not show the correct wraping of space caused by the big mass in the middle of the screen. Its shape is a compromise between aesthetics and numerics.
Link to demonstration video:
http://www.youtube.com/watch?v=pwXI-EiZE4o
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What's New in the Latest Version 1.06
Last updated on Jun 10, 2017
Old Versions
This app has been updated by Apple to display the Apple Watch app icon.
- support for iOS 9.1
- support for iOS 9.1
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Version History
1.06
Jun 10, 2017
This app has been updated by Apple to display the Apple Watch app icon.
- support for iOS 9.1
- support for iOS 9.1
1.05
Sep 27, 2014
- bug fix for iOS 8 (vortex mode background rotation fixed)
1.03
Sep 26, 2013
- added language support for French, Spanish, Chinese, Japanese, Italian and Russian
1.02
Sep 22, 2013
- bug fixes
1.01
Sep 18, 2013
- fixed some bugs
- added German language support
- added German language support
1.0
Sep 12, 2013
DR.Orbit FAQ
Click here to learn how to download DR.Orbit in restricted country or region.
Check the following list to see the minimum requirements of DR.Orbit.
iPad
Requires iPadOS 9.1 or later.
DR.Orbit supports English, French, German, Italian, Japanese, Portuguese, Russian, Simplified Chinese, Spanish