This Is Rocket Science: True Stories of the Risk-taking Scientists who Figure Out Ways to Explore Beyond

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Gloria Skurzynski. This Is Rocket Science: True Stories of the Risk-taking Scientists who Figure Out Ways to Explore Beyond

THIS IS ROCKET SCIENCE

by Gloria Skurzynski

CONTENTS

1. FIRE ARROWS

2. THE FATHERS OF MODERN ROCKETRY

3. BEEPS FROM SPACE

4. SATURN WINS, ORION LOSES

5. RETURN AND REUSE

6. SUCCESS AND FAILURE

7. WAY TO GO

8. FARTHER NEEDS FASTER

GLOSSARY

INDEX

Отрывок из книги

TRUE STORIES OF THE RISK-TAKING SCIENTISTS WHO FIGURE OUT WAYS TO EXPLORE BEYOND EARTH

THE FATHERS OF MODERN ROCKETRY

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What are the forces in Newton’s first law as it applies to rockets? Gravity is a force. From the first millisecond of launch, Earth’s gravity pulls on the rocket. The force of gravity between two objects depends on the masses of the two objects and the distance between the centers of mass of the two objects. As the distance between two objects gets larger—for example, the distance between Earth and a moving rocket—the gravitational force between them gets smaller.

Thrust is a force caused by hot gases coming out of the rocket that are counteracting the force of gravity and pushing upward against another force: air resistance. These three forces work together, acting on the rocket at launch and during flight.

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