Introduction
Cosmic Rulers
Planetary Planarity: Radial Velocity Technique; Target: Gamma Cephei; Other Targets
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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

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:

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