Astronomy magazine podcast: The Extraterrestial Life Debate
Author Michael Crowe discusses his book and how humanity has viewed the existence of life beyond Earth.
July 17, 2008
July 18, 2008
The Abell 2218 galaxy cluster is about 3 billion light-years away in the constellation Draco the Dragon. The cluster is so massive and compact it bends the light of more distant galaxies, producing distorted, arc-shaped projections seen in this Hubble Space Telescope image.
Photo by A. Fruchter (STScI) et al. / WFPC2 / HST / NASA
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