Planet Earth is called the "Goldilocks planet." Find out why it is just right for us!
On June 5, 2012, Venus will pass directly between Earth and the sun. Learn more about Earth's neighbor.
Sometimes the planet Earth is called the "Big Blue Marble."
Read about a wild solar storm and then play a fun game.
How do comets form and why do they have tails? Get the facts.
Asteroids are the biggest rocks in space.
Play games and learn about planets, moons, asteroids and comets.
Learn about Earth's atmosphere and how it's important to life on Earth.
Read about greenhouse gases and how our planet is like a greenhouse.
Read the story of the sun.
Scientist Kelly Fast explains why we have seasons on Earth.
Look at the Big Dipper to find the North Star.
Learn why astronauts seem to float inside the space station and how their floating is similar to riding an elevator.› View This Video
02.09.12 - NASA's new spacecraft will help astronauts travel farther into the solar system.
02.08.12 - Candice Hansen says that imagination is important in science.
11.09.09 - Robots make many NASA projects possible.
Testing new spacecraft materials before launching them into space is important. Check out this test that crushes a can!
Follow along as Nebula finds reasons to explore.
01.05.12 - Mark Chandler looks at weather in the past to see what Earth's future may be.
11.30.11 - Astronauts live and work on this lab in space.