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What Is Earth?
Planet Earth is called the "Goldilocks planet." Find out why it is just right for us!
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Venus for Kids →
On June 5, 2012, Venus will pass directly between Earth and the sun. Learn more about Earth's neighbor.
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'The Big Blue Marble' Storybook
Sometimes the planet Earth is called the "Big Blue Marble."
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'Shields Up!' →
Read about a wild solar storm and then play a fun game.
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Comet Facts →
How do comets form and why do they have tails? Get the facts.
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Asteroids for Kids →
Asteroids are the biggest rocks in space.
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Solar System Explorer →
Play games and learn about planets, moons, asteroids and comets.
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The Air We Breathe Picture Book
Learn about Earth's atmosphere and how it's important to life on Earth.
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Life in a Greenhouse? →
Read about greenhouse gases and how our planet is like a greenhouse.
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Our Very Own Star: the Sun
Read the story of the sun.
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Reasons for the Seasons -- NASA Now Minute
Scientist Kelly Fast explains why we have seasons on Earth.
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How Can I Find the North Star? →
Look at the Big Dipper to find the North Star.
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Why Do Astronauts Float Inside the Space Station?
Learn why astronauts seem to float inside the space station and how their floating is similar to riding an elevator.
› View This Video -
What Is Orion?
02.09.12 - NASA's new spacecraft will help astronauts travel farther into the solar system.
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Science and Imagination
02.08.12 - Candice Hansen says that imagination is important in science.
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What Is Robotics?
11.09.09 - Robots make many NASA projects possible.
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Test a New Spacecraft Material →
Testing new spacecraft materials before launching them into space is important. Check out this test that crushes a can!
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Why Do We Explore?
Follow along as Nebula finds reasons to explore.
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Piloting a Modern-Day Time Machine
01.05.12 - Mark Chandler looks at weather in the past to see what Earth's future may be.
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What Is the International Space Station?
11.30.11 - Astronauts live and work on this lab in space.
 "A boy floats upside down on the space station")