How a Spacewalking Hatch Works

A hatch is a special door on a spaceship that opens to space. Astronauts use it to go outside for a spacewalk. Here is how it works, in easy steps:

1. Put on the spacesuit: The suit is like a big warm coat and a helmet. It gives air and keeps the astronaut safe.
2. Go into the airlock: The airlock is a tiny room with two doors — one to the inside and one to space.
3. Close the inner door: This keeps the spaceship full of air while the airlock gets ready.
4. Make the air just like space: The airlock slowly takes the air out so the outside door can open safely.
5. Open the outer hatch: The outer door (the hatch) opens and the astronaut can float outside.
6. Use a tether: A tether is like a strong rope that keeps the astronaut from floating away from the spaceship.
7. Come back inside: When the spacewalk is done, the astronaut goes back through the hatch, the airlock fills with air again, and the inner door opens.

Why it is safe: The hatch and airlock keep the spaceship's air inside and make sure astronauts have air and stay tied to the ship. Astronauts check everything many times before opening the hatch.

Try a pretend play game:

1. Make an "airlock" with two chairs and a blanket as the middle room.
2. Be the astronaut: put on a coat and a hat as your spacesuit.
3. Close one chair-door, count to five, then open the other chair-door and pretend to float outside while holding a scarf as your tether.

That is how a spacewalking hatch works — a special door that helps astronauts go out into space and come back safe.