In this activity, students use a scale model of the Earth and identify altitudes of various satellites. They then use a smaller object on a string...
From the universe itself down to the tiniest subatomic particle, objects in our world exist in a mind-boggling array of sizes. With microscopes, we can look...
Distances in space are really, really big. The Voyager 1 spacecraft is heading out of our Solar System at 62,000 km per hour, but even at...
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