Focal Point
Part of the Discovering the Universe Curriculum Collection.
Timed-entry ticket reservations continue to be required for Museum entry. Facial coverings are strongly recommended. See Health and Safety.
Part of the Discovering the Universe Curriculum Collection.
What is a telescope's focal point, and why is knowing its location so important to astronomers? Grab a flashlight, an empty soda bottle, and a few other supplies; then find out.