Earth & Space
How does a space capsule return to Earth?
A space capsule comes home. The Wusels follow its journey through Earth's atmosphere.
The short answer
A returning capsule changes its path to enter Earth's air. There it slows sharply and gets very hot. A heat shield protects it; later, parachutes can slow it further.
An imagined Wusel scene
Puschel and Flauschi investigate
Puschel attaches a parachute to the capsule model high in space. Flauschi orders the picture cards: change course, pass through the hot stage with protection, then open the parachute later. He moves his card to the right place.
Try explaining it
What protects the capsule during the hot re-entry stage?
Choose a), b) or c), then explain your choice.
- a)Parachutes providing all protection in the hot early phase.
- b)The engine removing all air in front of the heat shield.
- c)A heat shield.
Show the explanation
Correct: c): A heat shield.
A returning capsule changes its path to enter Earth's air. There it slows sharply and gets very hot. A heat shield protects it; later, parachutes can slow it further.
Word help
- atmosphere
- The gas layer around a world; on Earth it is the air above us.
- orbit
- The path of one body around another.
Explore in more detail
Here you will find longer explanations and further details. You can explore them together.
Understand step by step
How it works – simply explained
The orbit is changed
An orbiting capsule must first slow or redirect appropriately so its path enters denser air.
Air slows and heats
At high speed, air ahead is strongly compressed and heated. A heat shield protects the interior. Return is not simply slow falling.
More slowing follows
Many capsules use parachutes after sufficient initial slowing. Landing and recovery are carefully planned. Other spacecraft use different methods; a drawing shows one example.
Why the parachute is not the first protection
Initially, a returning capsule travels very fast. Air ahead is strongly compressed and heated; the heat shield protects it. Many capsules use parachutes only after sufficient slowing. Parachutes do not replace heat shields. Re-entry means returning into denser air layers, not suddenly appearing just above the ground.
References for this explanation: [1]
The key points again
Discovery 1
A capsule changes its orbit to re-enter the atmosphere.
Source: [1]
Discovery 2
High-speed re-entry produces intense heating. A heat shield protects the capsule.
Source: [1]
Discovery 3
Many capsules later slow further with parachutes. Other spacecraft land differently; procedures are carefully planned.
Source: [1]