Cosmic Times

Cosmic Times

Age of the universe:
2 billion years
Size of the universe:
280 million light years

In Their Own Words

Photo of Albert Einstein

Image credit: Ferdinand Schmutzer, via Wikimedia Commons

Albert Einstein

New observations by Hubble…make it appear likely that the general structure of the Universe is not static.

– Einstein, 1925

Photo of Edwin Hubble

Image credit: Hale Observatories, courtesy AIP Emilio Segre Visual Archives

Edwin Hubble

Tomorrow the outlook may change and new methods may dwarf our knowledge and beliefs of today, or convert them into remote history. Soon we may look far beyond the last frontier, now 140,000,000 light years away. We, or our successors, may actually know familiarly the farthest borders of this vast Universe and learn facts about it so astounding that astronomers of today would be nearly unable to comprehend their significance.

– Edwin Hubble, 1927

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