Earth and Space

Big Idea: The Earth is a planet orbiting the Sun - one of many stars
in our galaxy, which is one of many galaxies in the Universe. More info...

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A stable orbit for a satellite

Here you compare the distance the satellite is carried sideways away from the Earth by its own motion and the distance that it...

Classroom Activity 11-14

Answer: two if you are in the International Space Station (ISS) and don’t know which module the bulb is in!

Stories from Physics 11-14 14-16