A More Perfect Heaven: How Copernicus Revolutionized the Cosmos

Guest: Dava Sobel.

The fact that the earth revolves around the sun may seem like common sense to us, but in the early sixteenth century, it was nothing short of ridiculous. Today's guest on Focus, writer Dava Sobel, explores the publication of Copernicus' heliocentric theory and the revolution of truly astronomical size that it would launch.

The James Webb Space Telescope

Guest: Jonathan P. Gardner, Ph.D.

This hour on Focus, we're joined by NASA astronomer and cosmologist Jonathan Gardner to discuss his work on the James Webb Space Telescope.

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