Lecturer

The first stars in the universe cartoon

Cosmic dawn: astronomers detect signals from first stars in the universe

February 28, 2018

"An experiment to estimate when stars began to form in the Universe suggests that gas temperatures just before stars appeared had fallen well below predicted limits, and that dark matter is not as shadowy as was thought."

"For the first time, scientists may have detected hints of the universe’s primordial sunrise, when the first twinkles of starlight appeared in the cosmos."  

"Stars began illuminating the heavens by about 180 million years after the...

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Public Talk: 50 year anniversary for the discovery of the cosmic microwave background

Public Talk: 50 year anniversary for the discovery of the cosmic microwave background

February 24, 2014
Thursday February 18, 2014 there were four short presentations celebrating the 50 years anniversary for the discovery of the cosmic microwave background (CMB) as evidence for the Big Bang. The event took place at Harvard-Smithsonian Center for Astrophysics and featured Alan Guth (inflation), Bob Wilson (co-discoverer of the CMB), Bob Kirshner (cosmic acceleration), and Avi Loeb (future of the universe).