DR.Orbit vs Stars and Planets

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

Experience the captivating wonders of the cosmos with Stars and Planets, an interactive 3D planetarium powered by precise data obtained from NASA and ESA space missions. Delve into a profound expedition through the infinite expanse of space, where an abundance of knowledge is readily available, directly sourced from the forefront of groundbreaking space research. Traverse the vast expanse of the galaxy, soaring through the stardust as you journey to millions of stars. Land on alien planets and exomoons, where breathtaking landscapes and untold wonders await your arrival. Embrace the thrill of plunging into the turbulent atmospheres of gas giants to reach their elusive cores. Push the boundaries of exploration as you venture closer to black holes, pulsars and magnetars, where the laws of physics are stretched to their limits. With Stars and Planets, the entire universe becomes your playground, providing an unmatched platform for discovery and enlightenment. Features ▶ Immersive spacecraft simulation allowing users to fly to different planets and moons and explore the depths of gas giants ▶ Land on exoplanets and take command of a character, exploring the unique surfaces of these distant worlds ▶ Daily updated information on exoplanets from multiple sources, eliminating the need for manual application updates ▶ Extensive online database encompassing approximately 7.85 million stars, over 7400 exoplanets, 205 circumstellar disks, 32868 black holes, 3344 pulsars and over 150 moons in our Solar System ▶ Comprehensive search system for efficient data retrieval of stellar and substellar objects ▶ Global accessibility with support for over 100 languages Data imported from various sources including: SIMBAD, The Extrasolar Planets Encyclopedia, NASA Exoplanet Archive, Planet Habitability Laboratory Join my discord server so you can see what new features are planned in the future or if you simply want to talk about space related stuff: https://discord.gg/dyeu3BR If you have a PC/Mac you can also access Stars and Planets from your browser here: https://galaxymap.net/webgl/index.html