AstronomyRockets Carry People and Machines Into Space
Nova stands on a sunny launchpad, pointing excitedly at a tall white rocket lifting off toward a bright blue sky that fades to black starry space above, with a bright plume of hot gas streaming from the bottom.
- Identify a rocket as a powerful machine that travels past the sky into space.
- Identify that rockets carry different kinds of cargo into space, including astronauts, rovers, telescopes, and satellites.
- Compare what is above the sky (space) with what we see around us on Earth.
- Predict what kinds of things a rocket might deliver to space.
Key terms
- rocket
- A powerful machine that burns fuel to push itself up past the sky into space.
- space
- The dark, airless place above Earth's sky where stars and planets are found.
- astronaut
- A person trained to travel into space wearing a special protective suit.
- rover
- A wheeled robot that drives on other worlds and sends pictures back to Earth.
- satellite
- A machine that orbits Earth to help with phones, maps, and weather.
How a Rocket Pushes Itself Up
A rocket works by burning special fuel inside its body. The burning makes a huge amount of super-hot gas that blasts out of the bottom of the rocket very fast. As the gas rushes down, it pushes the rocket the opposite way, which is up. The faster and harder the gas shoots out, the more the rocket is pushed upward, until it climbs past the clouds and reaches space.
What Rockets Carry to Space
A rocket is like a delivery truck for space. It can carry astronauts, who are people who explore space and do experiments. It can carry rovers, the wheeled robots that drive across other worlds. It can carry satellites that orbit Earth to help us call friends and check the weather, and it can carry giant space telescopes that take pictures of faraway stars and galaxies.
Worked examples
Decide whether an airplane can reach space.
- Remember that airplanes fly inside Earth's sky where there is air.
- Space is far above the sky and has no air for an airplane's engines.
- Only a rocket is powerful enough to push past the sky into space.
Answer: No — an airplane stays in the sky; only a rocket reaches space.
Pick the machine that drives on another world.
- Recall that astronauts are people, not driving machines.
- A satellite orbits Earth and does not drive on the ground.
- A rover is the wheeled robot that drives across other worlds.
Answer: A rover drives around on other worlds and sends back pictures.
Activity
Sort each item into the correct bucket — goes to space with a rocket, or stays in the sky or on Earth.
Practice
Name two kinds of cargo that a rocket can carry into space.
Explain one big difference between an airplane and a rocket.
Common mistakes to avoid
- Rockets and airplanes go to the same place.Airplanes stay inside Earth's sky, but rockets travel all the way into space.
- People can breathe normally out in space.Space has no air, so astronauts must wear special suits to breathe.
Check your understanding
What does a rocket do that an airplane cannot do?
A rover is a robot that a rocket can carry. What does a rover do in space?
Your friend says rockets and airplanes go to the same place because they are both flying machines that go high in the sky. Is your friend right?
Recap
A rocket is a powerful machine that burns fuel so hot gas blasts out the bottom and pushes it up past the sky into space. Rockets work like delivery trucks, carrying astronauts, rovers, satellites, and telescopes. Unlike airplanes, which stay in the sky, rockets reach the airless dark of space.
Reflect
If you could send one thing to space on a rocket, what would it be and why?