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In the early 1960s, scientists Arno Penzias and Robert Wilson discovered faint radio signals coming from every direction in the sky. They had discovered what is now called the "cosmic radiation background", which is the result of the heat of the Big Bang explosion cooling as the universe expanded.

photograph of Penzias and Wilson in front of their radio telescope

The StarChild site is a service of the High Energy Astrophysics Science Archive Research Center (HEASARC), Dr. Alan Smale (Director), within the Astrophysics Science Division (ASD) at NASA/ GSFC.

StarChild Authors: The StarChild Team
StarChild Graphics & Music: Acknowledgments
StarChild Project Leader: Dr. Laura A. Whitlock
Curator: J.D. Myers
Responsible NASA Official: Phil Newman