The Center for Astrophysics | Harvard & Smithsonian
The Center for Astrophysics | Harvard & Smithsonian
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What Happened Before the Big Bang?

  • An artist's illustration showing the patterns of signals generated by primordial standard clocks in different theories of the primordial universe. Top: Big Bounce. Bottom: Inflation.

    An artist's illustration showing the patterns of signals generated by primordial standard clocks in different theories of the primordial universe. Top: Big Bounce. Bottom: Inflation.

    Credit: CfA/Zhong-Zhi Xianyu, Xingang Chen, Avi Loeb

    Low Resolution Image