There are robots on Mars and a car parked on the Moon.

Who sent them? What did they discover? Explore other worlds and meet the machines we left behind.

Start exploring

Ready for take-off?

Spin a world, track down the rovers, landers and robots we left out there, and find out what each one discovered.

Let’s fly to

The Moon.

Follow the footprints.
Meet the machines.

Missions: 4
Places: 10
Years: 1966–1971

Let’s fly to

Mars.

Follow the wheel tracks.
Find a different kind of explorer.

Missions: 5
Places: 8
Years: 1976–2021

Let’s go even further

Beyond.

Go past the Moon and Mars.
Find the ones still travelling.

Missions: 4
Years: 1972–2011

Echo: Hi, I'm Echo, a little rover who loves exploring! Where shall we go first? Pick the Moon, Mars or somewhere even further, and I'll show you what we left there.

They went silent.
Their echoes didn't.

Most of these machines stopped calling home a long time ago. Their power ran out, dust covered their solar panels, or their job was simply done. But the photos, measurements and discoveries they sent back are still changing what we know about space. Their stories are waiting for you.

It's not space junk. It's a trail of clues.

Far from Earth, there are machines that nobody will ever switch on again. Rovers that once rolled across the red deserts of Mars. Landers that carried the first people to walk on another world. A tiny helicopter that made the first powered flight on another planet.

Most of them are still right where their journeys ended. Each one was sent to answer a big question, and together they tell the story of how we learned to explore space, one daring try at a time. Follow the clues and you'll find out:

Why they went
The big question each one was sent to answer, and why a robot or an astronaut had to fly all that way to find out.
What they found
Moonquakes, signs that water once flowed on Mars, thousands of planets around other stars. Discoveries that changed what we know.
Why they stayed
Bringing things home takes fuel, and fuel is heavy. Most of these machines were built for a one-way trip from the very start.
Where they are now
Exactly where each one ended up, which ones still help scientists today, and which are still flying out of our solar system.

Echo: Some of these machines are still at work! Scientists on Earth still bounce laser beams off mirrors that Apollo astronauts left on the Moon.

And beyond

Some NASA spacecraft ended their journeys far, far away. One rests on an asteroid, one circles a dwarf planet, one drifts around the Sun, and two are still flying out of our solar system. Come and meet them!

Let's go even further

Echo: Not everything stayed on the Moon or Mars. Some of our machines went much, much farther!

Like lists better than globes? See every spot on the Moon or every spot on Mars as a simple list.

There are robots on Mars and a car parked on the Moon.