Exploring the International Space Station
Gravity still pulls hard on the International Space Station, and yet it never falls to Earth. Astronauts from many countries live and work aboard this orbiting laboratory, running experiments and studying our planet from above.
What is the ISS?
The ISS is a large spacecraft that orbits Earth: part home, part laboratory, part observatory, built to be lived in rather than just visited.
What Do Astronauts Do on the ISS?
Astronauts on the ISS spend their time on a few main jobs:
- Conduct experiments: They study how things behave in space, like plants, liquids, and even themselves.
- Observe Earth: They take pictures and collect data to learn about our planet's climate, weather, and environment.
- Repair and maintain the station: The ISS needs regular check-ups and repairs to keep it running smoothly.
- Prepare for future missions: They test new technologies and practice skills that will be needed for future space exploration.
How Does the ISS Stay in Space?
The ISS stays in space because it is constantly moving around Earth. This movement creates a force that balances the pull of Earth's gravity. It's like swinging a bucket of water around – the water stays in the bucket because of the circular motion.
So the ISS is not sitting still up there. It is racing, and the racing is the whole trick. Stop it moving and it would come straight down.
Gravity still pulls hard on the ISS. So why doesn't it fall to Earth?
- It is far enough away that gravity cannot reach it
- It is moving around Earth so fast that the motion balances the pull
- The solar panels hold it up like wings
What the ISS Looks Like
The station overhead was never launched as one piece — it was assembled section by section in orbit, and it is still crewed by astronauts from many countries working side by side, studying the planet they came from.