Allan R. Sandage

National Medal of Science

Physical Sciences

For bringing the very limits of the universe within the reach of man's awareness and unraveling the evolution of stars and galaxies--their origins and ages, distances and destinies.

For bringing the very limits of the universe within the reach of man's awareness and unraveling the evolution of stars and galaxies--their origins and ages, distances and destinies.

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Birth
June 18, 1926
Age Awarded
44
Country of Birth
USA
Key Contributions
Discovered First Quasar
Most Accurate Values For Hubble Constant
Age Of Universe
Awarded by
Richard Milhous Nixon
Education
University of Illinois
California Institute of Technology
Areas of Impact
Energy & Environment
Affiliations
Carnegie Institution of Washington
I

In 1949, Allan Sandage – a self-described “hick who fell off the turnip truck” – became the assistant for Edwin Hubble, the astronomer after whom NASA’s famous space observatory is named.

At the time, Hubble was preparing to investigate a famous theory:

Assuming the universe was created in a Big Bang, could it disappear one day in a Big Crunch?

Soon after, Hubble died, leaving the fate of the cosmos in the hands of Sandage, then 27.

In 1961, Sandage explained how the state of the universe is found in two numbers: the cosmic expansion rate, and the deceleration parameter, which shows how fast expansion is being slowed.

The universe, he concluded, is not slowing down enough for a “Big Crunch” to occur.

“So the universe will continue to expand forever,” he said, “and the galaxies will get farther and farther apart, and things will just die. That’s the way it is.”

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