231: How big is space?

The Bullet cluster, as imaged by JWST and Chandra. Image credit: NASA, ESA, CSA, STScI, CXC. Source.

A question from Issac, age 4. Dr. Jeff Rich answers. For more on Dr. Rich's work, see episodes 14, 81, 118, or 159, or visit the Carnegie Observatories website. Find the pocket solar system instructions here.

Copies of the pocket solar system instructions are also available here in English and Spanish.