Apollo 11 Free Return Trajectory
Relive Apollo 11's translunar flight. Trace the historic figure-eight free-return trajectory that used lunar gravity to slingshot astronauts safely back to Earth without fuel.
Scenarios
Spaceflight
Step into the shoes of aerospace engineers with realistic spaceflight simulations and trajectory trackers. Utilize real NASA JPL Horizons data to visualize, interact with, and analyze the exact paths of humanity’s most ambitious orbital missions.
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Earth–Mars Hohmann Transfer
Simulate a fuel-efficient Hohmann transfer orbit from Earth to Mars. Follow the 241-day interplanetary elliptical coast tangent to both planetary orbits in interactive 3D.
Venus Express: Earth to Venus
Track ESA's Venus Express on its 153-day interplanetary transit from Earth to Venus. Follow the sunward Hohmann-style transfer trajectory using real orbital mechanics in 3D.
TESS: Earth–Moon Orbit
Simulate NASA's TESS exoplanet hunter in its ingenious 13.7-day high-Earth orbit, kept stable above the radiation belts in a 2:1 resonance with the Moon using JPL states.
Operational Spacecraft at Mars, 2026
Explore Mars with six operational orbiters simultaneously in 2026: Odyssey, Mars Express, MRO, Trace Gas Orbiter, Hope, and Tianwen-1, simulated on real JPL Horizons orbits.
Operational Spacecraft at the Moon, 2026
Explore the Moon with five active orbiters in 2026: NASA's LRO, ISRO's Chandrayaan-2, Korea's Danuri, and ARTEMIS P1/P2, navigating lunar gravity in high-precision 3D.
New Horizons: Jupiter to Pluto
Relive New Horizons' epic interplanetary voyage from Earth to Pluto. Watch its 2007 Jupiter gravity assist accelerate the probe toward its historic 2015 Pluto flyby in 3D.
Ulysses: Jupiter Polar Orbit
Follow the Ulysses spacecraft as a powerful Jupiter gravity assist cranks its trajectory into an unprecedented 76-degree polar orbit to explore the uncharted poles of the Sun.
Juno Flyby of Europa, 10 April 2020
Track NASA's Juno spacecraft during its 10 April 2020 distant flyby of Europa. Follow its trajectory as it sweeps through the Jovian system using official JPL Horizons states.
Juno Flyby of Europa, 16 October 2021
Simulate Juno's 16 October 2021 flyby of Europa during perijove 37. Watch the probe close to 81,360 km above Europa's fractured ice crust on an accurate JPL Horizons trajectory.
Juno Flyby of Europa, 24 February 2022
Follow NASA's Juno probe during its perijove 40 encounter with Europa on 24 February 2022. Experience a 46,982 km altitude orbital pass through Jupiter's radiation belts in 3D.
Juno Flyby of Europa, 29 September 2022
Witness NASA's Juno spacecraft skimming just 355 km above Europa's icy shell on 29 September 2022. Experience one of the closest Jovian moon flybys in history in 3D.
Juno Flyby of Ganymede, 20 July 2021
Simulate Juno's perijove 35 close encounter with Ganymede on 20 July 2021. Trace the spacecraft's 49,992 km flyby through Jupiter's magnetosphere with JPL orbital data.
Juno Flyby of Ganymede, 26 December 2019
Follow NASA's Juno spacecraft on 26 December 2019 as it sweeps past Jupiter's giant moon Ganymede at an altitude of 97,100 km, integrated from precise JPL Horizons states.
Juno Flyby of Ganymede, 7 June 2021
Experience Juno's historic low-altitude flyby of Ganymede on 7 June 2021. Watch the spacecraft plunge within 1,053 km of the Solar System's largest moon in high-precision 3D.
Juno Flyby of Io, 1 March 2023
Experience Juno's 1 March 2023 flyby of Io during perijove 49. Watch the probe sweep 51,522 km above Io's active sulfur volcanoes in this 3D Newtonian orbital simulation.
Juno Flyby of Io, 14 December 2022
Simulate NASA's Juno spacecraft approaching Io on 14 December 2022 for perijove 47. Follow its trajectory down to 63,743 km altitude using JPL Horizons orbital ephemerides.
Juno Flyby of Io, 15 October 2023
Follow Juno's close encounter with volcanic moon Io on 15 October 2023. Trace the spacecraft's high-speed trajectory down to 11,641 km during perijove 55 with JPL data in 3D.