Astronomy > Solar System Scavenger Hunt

The Earth is a large, round ball. It just looks flat because you can only see a tiny part of it at one time. The Sun and the planets are also round because when they formed, gravity  pulled all their parts as close to their centers as possible.

Though they're all round, planets are NOT all the same size. Mercury  would be as big as an orange, and Jupiter would be the size of a small car.

To size up the planets for yourself, create a scale model of the solar system using objects from around your home!

What if you could shrink the planets so they fit on a kitchen table in front of you? The table below shows how big they would be.

Use the chart below to make a scale model of the solar system. A scale model is a smaller or larger version of something. It lets you compare the sizes of objects you can't see up close, or that are too far apart to see together.

Look for objects around your home that fit the scaled-down sizes of the planets and the Sun. All you need is a ruler and your imagination!

Hint: Hunt all around the house: in the kitchen, the tool closet, the storage room. You can use anything from peppercorns to fruit to a basketball. Remember, everything should be round like the planets.