Every satellite tracker shows you where things are now. Very few let you ask a different question: where was it then? Where was the Space Station during last week's meteor shower? What did the sky above your city look like the night Starship flew? Where was Voyager 1 on the day you were born?
SatFleet Live includes a feature called Playback — satellite time travel — that answers exactly that. You pick a date, hit play, and the whole sky rewinds: orbits, spacecraft, planets, sunlight and shadows, all reconstructed from real archived data rather than guessed from a model.
Earth satellites can be rewound up to 30 days. The Moon, Mars, the planets and interplanetary spacecraft can be rewound all the way to 4 October 1957 — the day Sputnik 1 launched and the Space Age began. Today and yesterday are free for everyone.
What Is Satellite Time Travel?
Satellite time travel means replaying the position of objects in space at a chosen moment in the past, instead of only watching them live. On SatFleet Live it works across every map in the app: the Earth satellite globe, the Moon tracker, the Mars tracker and the Deep Space map.
Once you are in Playback, a timeline appears at the bottom of the screen. You can scrub through it with your finger, play it at real speed, or speed it up to one day, one week or even one year per second, depending on which map you are on. Everything on screen follows that clock — not just the dots, but the whole scene.
Orbits rewind
Over 16,000 satellites move to the positions they actually held on that date, using the orbital data published that day.
Sunlight is recalculated
The day and night sides of Earth, the Moon and Mars match the real sun angle for the moment you are viewing.
Missions replay
Spacecraft with published trajectories, such as Artemis II, can be followed across their entire flight.
Rovers move
On Mars, Curiosity and Perseverance sit where they actually were on the sol you selected.
How Far Back Can You Go?
This is where satellite tracking gets genuinely interesting, because the answer is different depending on what you are looking at — and the reason is worth understanding.
Earth satellites: 30 days
Satellites orbiting Earth are tracked using TLE data, a compact description of an orbit published daily by CelesTrak and NORAD. The catch is that a TLE describes the orbit as measured on that day. Orbits drift — atmospheric drag, station-keeping burns, collision avoidance manoeuvres — so a TLE from three months ago cannot accurately tell you where a satellite was three months ago.
SatFleet Live solves this by taking a snapshot of the entire catalogue every night and storing it. That rolling archive is what powers Earth satellite playback, and it currently reaches back 30 days. Within that window, positions are as accurate as live tracking. Beyond it, the data simply does not exist in public form.
Moon, Mars and deep space: back to 1957
Everything outside Earth orbit works differently. The Moon, the planets, dwarf planets, major moons and interplanetary spacecraft are not tracked with TLEs at all — their positions come from NASA/JPL Horizons, an ephemeris system that can calculate where a body was, or will be, at essentially any moment.
That means Deep Space playback reaches back to 4 October 1957, the launch of Sputnik 1. You can watch Voyager 1 creep outward across decades, see the planets line up on a date that mattered to you, or follow a mission from launch to arrival.
| Map | How far back | Data source |
|---|---|---|
| Earth satellites | 30 days | Archived TLE snapshots |
| Deep Space | Since 1957 | NASA/JPL Horizons |
| Moon orbiters | Since 2009 | NASA/JPL Horizons |
| Mars orbiters & rovers | Since each arrival | NASA/JPL Horizons |
Real Data, Not a Simulation
It is worth being precise about this, because plenty of space visualisations are animations dressed up as data.
When you rewind an Earth satellite, SatFleet Live loads the actual orbital elements published on that date and propagates them with SGP4 — the same model used for live tracking. When you rewind the Moon, Mars or a deep space probe, the app queries NASA/JPL Horizons for the true position of that body at that instant. Nothing is interpolated from a generic orbit or invented to look plausible.
If a spacecraft performed a manoeuvre, changed altitude or was nudged off course, the replay shows it. That is the difference between reconstructing history and animating an idealised orbit.
Beyond Earth: Moon, Mars & Deep Space
Earth satellite playback is useful. Deep space playback is where it becomes something you lose an hour to.
Replay a real Moon mission
Artemis II flew from 1 to 11 April 2026, carrying four astronauts around the Moon and back. In Deep Space playback you can select that window and watch the Orion capsule leave Earth orbit, arc around the far side of the Moon and return — following the trajectory data NASA itself published. Historic hardware is in there too, including Snoopy, the Apollo 10 lunar module still drifting somewhere in solar orbit.
Watch the Moon's phase change
On the Moon tracker, playback also drives the lighting and the phase indicator. Scrub through a month and you watch the terminator sweep across the surface exactly as it did, with the phase matching what was visible from Earth that night.
Follow a rover across Mars
Mars playback converts your chosen date into the correct Martian sol, so Curiosity and Perseverance appear at the positions they had actually reached by then. Combined with the rover trail data, you can trace years of driving in a few seconds.
How to Use Satellite Time Travel
- Open any map Go to the live satellite globe, or switch to the Moon, Mars or Deep Space tracker.
- Tap Playback The button sits at the bottom of the screen, next to Explore.
- Pick a date A calendar shows which dates are available. Free dates are open; earlier ones carry a lock.
- Press Go The app loads the archived data for that moment. Deep space dates can take a few seconds, since they are calculated fresh from NASA.
- Play, scrub or speed up Use the timeline to move through time at anything from real speed to one year per second.
Today and yesterday are free, with no account needed. Going further back — the full 30-day Earth satellite archive, plus Moon, Mars and deep space history all the way to 1957 — is part of SatFleet Premium, which keeps an independently built app running without ads.
Five Things Worth Rewinding
- A launch you missed. Rewind to the moment a rocket lifted off and watch its payload settle into orbit. Pair it with our guide on how to watch a rocket launch live.
- A Starlink train. Newly deployed satellites fly in a tight line before dispersing. Rewind a few days and you can see the formation break apart — the effect explained in how to spot a Starlink train.
- The night sky over your city. Set your location, pick a night you remember, and see what was passing overhead.
- A planetary alignment. In Deep Space, speed up to one month per second and watch the planets fall in and out of line across years.
- Voyager's long haul. Start in 1977 and run it forward. Nothing conveys the scale of the solar system quite like watching the fastest thing humans ever launched take decades to cross it — as covered in where is Voyager 1 now.