CelestialQuest: Space Explorer

Explore space, with real physics under every maneuver. CelestialQuest is a spacecraft simulator built on actual astronomy. The stars are where they really are. The planets are where they really are, right now, on today's date. Fly from low Earth orbit to the satellite galaxies. THREE DRIVES - ION — precise maneuvering and orbital work, 0 to 100 km/s. - REL — sub-light travel, 0 to 0.9999c, with everything relativity implies: your clock falls behind Earth's, the sky aberrates, and starlight shifts blue ahead of you and red behind. - WARP — an Alcubierre-inspired model, clearly labelled speculative, C1 to C21 apparent speed for crossing interstellar distances. REAL PHYSICS, HONESTLY LABELLED - Special relativity: Lorentz factor, time dilation, proper time. Near the light barrier your clock runs roughly 70x slower than Earth's. - Real Keplerian orbits. A 400 km Earth orbit takes 92 minutes, because that is how long it actually takes. - Planetary positions from NASA/JPL J2000 orbital elements. - The science panel tells you exactly which parts are established physics, which are approximations, and which are speculative. 152 REAL DESTINATIONS The Sun, every planet, dwarf planets, major moons, asteroids and comets. 105 nearby stars at their true measured distances. 47 deep-sky objects — the Orion Nebula, the Pillars of Creation, Sagittarius A*, Andromeda — grouped by galactic region out to the satellite galaxies. A SKY MADE OF REAL DATA 119,625 catalogued stars at true positions, colored by measured spectral index and sized by apparent magnitude. Fly far enough and the constellations shift, because parallax is real. Behind them, the Milky Way's disk, bulge and arms. Approach a deep-sky object and it resolves into an actual photograph from Hubble, JWST, Chandra or ESO. LIGHT IS SLOW Every distance is also a delay. Reach the Crab Nebula and the light arriving at your cockpit left in 1054 AD — the year Chinese astronomers recorded the supernova that made it. The app tells you, everywhere, how far into the past you are looking. TIME IS THE MECHANIC Clocks always run at real time — there is no artificial speed-up dial. What changes is how much distance each drive covers while they run. - Under ION, a journey takes as long as the physics says. Mars at 75 km/s is roughly a twelve-day trip. Close the app and come back: the mission continues while you are away, and your position, heading and clocks are exactly where you left them. - Under REL, relativity itself becomes the fast travel. Run to Proxima Centauri at 0.9999c and 4.25 years pass on Earth — but only about three weeks pass aboard your ship. The distance did not shrink; your experience of it did. That gap is real and shown live on two clocks. - Under WARP, distance stops mattering. At C10 the same crossing takes a fraction of a second. This is the speculative drive, labelled as such — but it is how you see the galaxy in an afternoon. The mission log records what you have done, in real units: how far behind Earth your clock has fallen, how far you have travelled, which worlds you reached first. STILL GROWING CelestialQuest is actively developed. New destinations, higher resolution textures, and new telescope imagery are added over time — and every update is free to anyone who owns the app. WHAT THIS APP DOES NOT DO No ads. No in-app purchases. No subscriptions. No analytics, no tracking, no third-party SDKs. It requests no permissions and has no internet access at all — everything is bundled inside the app. It works on a plane, in a basement, forever. Buy it once. Own it for life. Every future update included. IMAGE CREDITS Astronomical imagery courtesy of NASA, ESA, CSA, STScI, the Chandra X-ray Center, ESO and NOIRLab/NSF/AURA. Star positions from the HYG database (Hipparcos, Yale, Gliese) and ESA Gaia. Per-image credits are in the app. Not affiliated with or endorsed by NASA, ESA or any other agency.