Size It UpDaily

Think beyond Earth

Size It Up: Space

Planets, moons and spacecraft. Bring enormous distances down to a comparison you can see.

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Today’s challengeRound 1 of 5
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How large is the target compared with the reference?

Navy stays fixed. Resize red.

Two labeled objects appear on a shared baseline. Adjust the target object until its displayed size matches its real-world scale relative to the reference.

The fixed reference is on the left and the resizable target is on the right. Use the scale control or arrow keys, then lock in your estimate.

1x

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The game in focus

How to play Space

Resize the Moon against Earth, compare giant planets, and judge a Space Shuttle beside a passenger aircraft. Unlimited rounds make it easy to build a few reliable astronomical anchors.

Planet rounds use approximate diameters. Saturn’s rings are decorative and do not add to its measured diameter; the Shuttle is the orbiter alone. Measurement notes →

A few comparisons you can practice

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