January 9

How Big is It?

Fourth grade is studying the planets and stars. In their first lab, we discussed that in many illustrations the planets look close together and approximately the same size. We looked at the following pictures that correct that misunderstanding. Then we did an activity in which we used AU (astronomical units) to model the relative distance between planets.

 1 AU is 93 million miles.  It is based upon the Earth’s distance from the sun.

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