DR.Orbit vs Cosmic Atlas

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

Go beyond star gazing. Visit nearly 5,000 lifelike exoplanets and navigate 180 trillion square light years of the universe beyond our solar system. Featuring 6 modes of interstellar travel and examination, Cosmic Atlas is an open-world space exploration app for those who look up at the night sky and wonder what we may find in the infinite frontier of the universe. Try it free and fly anywhere in the solar system plus six bonus planetary systems for a total of 50+ stunning planets, moons, and dwarf planets. Upgrade for all the incredible planets and features to explore every corner of the Milky Way mapped by NASA, JPL, ESA, and other international space programs. ::::: VISIT THOUSANDS OF PLANETS ::::: First-person view of 4,987 recently discovered exoplanets with stunning 3D models featuring detailed atmospheres and surfaces using science-driven artist renderings, including: [•] Potentially habitable Earth-like planets in the Habitable Zone that can support liquid water [•] Hot terrestrial planets closer to the system's star with landscapes from windswept sands to volcanic infernos or oppressive Venus-like atmospheres [•] Cold terrestrial planets past the habitable zone covered with rocks, frozen deserts, or sheets of ice [•] Jovian gas giants with colorful cloud layers based on the elements visible in the upper atmosphere at different temperatures [•] Neptunian ice giants with outer clouds that appear glassy smooth or enveloped with strings of cool clouds ::PLUS:: High resolution planets, moons, and dwarf planets in our own Solar System created from enhanced NASA mission images ::::: MASSIVE OPEN COSMIC ENVIRONMENT ::::: [•] Over 180 trillion square light years of the Milky Way ready to explore at it’s true scale [•] 116,000+ unique stars individually colored to match their true color temperature in blue, yellow, or red spectrums [•] 3,710 unique planetary systems with confirmed exoplanets [•] Scientifically accurate star positions and luminosity to see what the night sky looks like from distant worlds [•] Data-rich information panels to learn about planet attributes, parent system, discovery method, and research programs credited with its discovery [•] Flag stars and planets to easily revisit later ::::: SIX EXPLORATION MODES ::::: [New!] Telescope :: to point your phone at the sky to identify planets, stars, and distant planetary systems Pilot :: with first person flight controls and autopilot to lock trajectory toward a selected destination Orbit :: to easily navigate systems and rotate or zoom in to examine planets Navigator :: to find nearby systems and planets or revisit saved planets Database :: to browse the complete catalog find new exoplanets, planetary systems, and stars Search :: to find specific stars and exoplanets or nearby planets, moons, and dwarf planets in our solar system ::::: SETTINGS ::::: HDR Lighting :: Active by default, HDR lighting shows realistic relative brightness of stars and planets. Toggle HDR off for consistent lighting with stars and the Milky Way always visible in the background. Systems Only :: Enable to hide labels for stars without exoplanets in Pilot, Navigator, & Telescope modes. Objects with Info Only :: Enable to hide labels for stars without detailed data available. ::::: DATA SOURCES ::::: Using the latest exoplanet data from programs by NASA and the European Space Agency, Cosmic Atlas is a true-to-scale 3D environment where users can freely explore our small section Milky Way galaxy and examine thousands of newly discovered stars and exoplanets. The latest planetary system data is collected from a number of public research programs, including the University of Puerto Rico's Planetary Habitability Laboratory and the NASA Exoplanet Archive, which is operated by the California Institute of Technology, under contract with NASA under the Exoplanet Exploration Program.