DR.Orbit
免費
1.06for iPad
Age Rating
DR.Orbit 螢幕截圖
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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最新版本1.06更新日誌
Last updated on 2017年06月10日
歷史版本
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
2017年06月10日
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
2014年09月27日
- bug fix for iOS 8 (vortex mode background rotation fixed)
1.03
2013年09月26日
- added language support for French, Spanish, Chinese, Japanese, Italian and Russian
1.02
2013年09月22日
- bug fixes
1.01
2013年09月18日
- fixed some bugs
- added German language support
- added German language support
1.0
2013年09月12日
DR.Orbit FAQ
點擊此處瞭解如何在受限國家或地區下載DR.Orbit。
以下為DR.Orbit的最低配置要求。
iPad
須使用 iPadOS 9.1 或以上版本。
DR.Orbit支持俄文, 德文, 意大利文, 日文, 法文, 簡體中文, 英文, 葡萄牙文, 西班牙文