Sarah Stewart
Thursday, March 26, 2020 - 7:00pm

THIS EVENT HAS BEEN POSTPONED TO LIMIT OUR COMMUNITY'S EXPOSURE TO COVID-19, IN ACCORDANCE WITH GUIDANCE FROM THE CENTERS FOR DISEASE CONTROL AND LOCAL OFFICALS.

WE ARE WORKING TO RESCHEDULE AND WILL KEEP YOU UPDATED AS WE KNOW MORE.

The origin of the Earth and Moon is one of science’s greatest mystery stories, complete with false starts and dead ends. The Apollo missions shattered all the previous ideas about making the Moon. But the precious lunar samples contain a major clue to our planet’s creation: the Moon is Earth’s isotopic twin. The isotopes of different elements are like a planetary fingerprint: no two bodies are the same – except the Earth and Moon. After Apollo, a giant impact became the most likely explanation for the Moon, but it failed to explain this key observation. Stewart will talk about the accidental discovery of a new type of astronomical object, called a synestia, that may save the idea of a giant impact and forever change the way you think about the birth of our planet.

Dr. Sarah T. Stewart: Professor, University of California, Davis

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