Introduction
Cosmic Rulers
Planetary Planarity
Radial Velocity Technique
Target: Gamma Cephei
Other Targets
Tools of the Trade

Extrasolar Planets, Radial Velocity, and Astrometry

Fun with Physics

The adult moves closer to the fulcrum (the top of the triangle), which is the teeter-totter’s balance point.

A Dynamic Situation

illustration of the adult closer to the seesaw fulcrum than the child, and the seesaw is balanced

A Teeter-Totter in Action

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Note that the adult is moving slower than the child.

Now suppose you were up in a tree looking straight down on this activity. You would see something like this:

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Again, note that the adult is moving slower than the child. Can two adults play on a teeter-totter? Sure!

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