Explore Learn Discover
A Journey Beyond Earth
Interactive 3D explorations, real NASA data, scientific calculators and engaging lessons — your gateway to the universe.
Tools & Learning
Discover. Calculate. Learn. Explore.
Powerful scientific tools, interactive simulations and easy-to-follow lessons for curious minds of all ages.
James Webb Space Telescope · illustrative 3D model
- Mission ControlTrack real spacecraft and real-time space data
- Cosmic AtlasExplore planets, moons and dwarf planets
- AstroCraft LabDesign and build spacecraft
- Space CalculatorsOrbital mechanics, rockets and more
- Exoplanet HunterSearch for distant worlds using real data
- Learn & QuizLessons, quizzes and glossary
A digital observatory
Real data. Honest simulations. Physics you can check.
SpaceWonder connects to public scientific services — JPL Horizons, the NASA Exoplanet Archive, live ISS tracking — and labels every number with where it came from. When real data doesn't exist, we say so.
Cosmic Atlas
Explore the Solar System in 3D
Every planet placed where it really is today, calculated from JPL orbital elements. Switch between an educational view and true scale, follow worlds along their orbits and compare sizes.
Mission Control
Follow real spacecraft
Follow the ISS in real time, see how far Voyager, Webb, Europa Clipper and JUICE are from Earth using NASA/JPL Horizons, and train on the anomalies real flight controllers face.
- Real-time ISS ground track computed from NORAD orbital elements
- Deep-space distances, signal delay and 30-day trends
- Eight mission-challenge scenarios with scoring
International Space Station
- Speed
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- Altitude
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- Latitude
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Mission library
Featured missions
From the first crewed lunar flight in half a century to the most distant human-made object.
- CompletedArtemis IINASA · CSA · 2026The first crewed flight of NASA's Space Launch System and Orion spacecraft carried four astronauts around the Moon and back — the first humans to travel to the Moon's vicinity since Apollo 17 in 1972.
- ActiveJames Webb Space TelescopeNASA · ESA · CSA · 2021The largest space telescope ever launched, observing in infrared with a 6.5 m segmented mirror shaded by a five-layer sunshield the size of a tennis court.
- ActiveVoyager 1NASA · 1977The most distant human-made object. After flying past Jupiter and Saturn it became the first spacecraft to cross the heliopause into interstellar space in 2012.
- En routeEuropa ClipperNASA · 2024The largest planetary spacecraft NASA has built, designed to make about 49 close flybys of Europa to assess whether its ocean could support life.
AstroCraft Lab
Engineer your own spacecraft
Pick a bus, engines, tanks, power and instruments. Watch total mass, delta-v, thrust-to-weight, power budget and cost update with every choice — then take on five design challenges, from a CubeSat to a two-stage launcher.
Open the labStage-by-stage Δv
Tsiolkovsky equation applied to every stage
Modular components
Six engine classes, four buses, power, comms, instruments
Design challenges
Lunar orbiter, Mars probe, launch vehicle and more
8 experiments
Newton's cannon, drag decay, momentum, solar power
Exoplanet Hunter
Find worlds around other stars
Simulate a transit and its light curve, add realistic noise and measure the planet yourself. Map habitable zones around different stars, then search more than 6,000 confirmed exoplanets live from the NASA Exoplanet Archive.
Start huntingPhysics calculators
24 validated calculators
Orbital mechanics, rocketry, relativity and stellar physics — each with its formula, assumptions, a worked solution and a shareable link.
Academy
Learn space science, step by step
Sixteen lessons from the basics of astronomy to astrodynamics and astrophysics, each with an illustration, a simulation to try and a knowledge check.
Beginner
Intermediate
Latest discoveries
News from across the cosmos
Headlines from NASA, ESA and established space publications, linked to the original source.
Launches & events
What's next in space
Upcoming launches worldwide and the next eclipses, meteor showers and moon phases.