On its way to Jupiter, the Galileo spacecraft looked back and captured this remarkable view of Earth and the moon. The image was taken from a distance of about 3.9 million miles. NASA hide caption

toggle caption NASA

An artist's impression of a gamma-ray burst, a powerful jet of energy lasting from less than a second to several minutes. The most powerful events in the universe, they are thought to be mostly associated with the explosion of stars that collapse into black holes. A. Roquette/ESO hide caption

toggle caption A. Roquette/ESO

Venus on the eastern limb of the Sun captured by TRACE satellite. NASA hide caption

toggle caption NASA

13.7: Cosmos And Culture

The Venus Transit: Who Cares?

There is far deeper and far more intimate reason why the Venus transit matters and it's all about Time.

Listen Loading… 4:01
  • Playlist
  • Download
  • Embed
    <iframe src="http://www.npr.org/player/embed/154282601/154310822" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

The surface of Mercury is seen in a picture taken by NASA's Messenger spacecraft as it approached the planet during a fly-by on January 14, 2008. The image was taken about 11,000 miles from the planet and shows a region 300 miles across. NASA/Getty Images hide caption

toggle caption NASA/Getty Images

NPR thanks our sponsors

Become an NPR sponsor