SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aero-microgravity-free-fall

Why do astronauts float inside the space station?

They are in free fall, falling around Earth together with the station.

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  1. They are falling around Earth with the station ✔
  2. There is no gravity in space
  3. The station has no air to hold them down

Why: Gravity still pulls hard on the station and everyone inside. They all fall at the same rate, but they move sideways so fast that they keep missing Earth. That shared falling makes them look weightless.

Huh, didn't know that: Calling it "zero gravity" is misleading. Scientists say microgravity, because gravity is still there.

The dad joke
Why did the astronaut never get tired of falling? Because she kept missing the ground.
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References

Answer: They are falling around Earth with the station. Gravity still pulls hard on the station and everyone inside. They all fall at the same rate, but they move sideways so fast that they keep missing Earth. That shared falling makes them look weightless.

  1. NASA: What Is Microgravity? (Grades 5-8) www.nasa.gov/learning-resources/for-kids-and-students/what-is-microgravity-grades-5-8
    why do astronauts float there? The answer is because they are in free fall
    Checked 2026-10-10.

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Flying & DronesAt the space station's height, Earth's gravity is about how strong compared to the ground?Flying & DronesWhy do astronauts float while orbiting Earth?Flying & DronesHow strong is gravity on the Moon compared to Earth?

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