MIfA Director Evan Skillman and Administrator Katie Sauer hope that you are able to join them for the second virtual “MIfA Public Lecture".
Featured Speaker: Dr. Pat Kelly
Lecture Title: Galaxy Clusters as Nature’s Strange Magnifying Glasses
Abstract: Galaxy Clusters are vast concentrations of many hundreds of galaxies bound together by gravity. Einstein's theory of general relativity predicts that if light traveling towards us passes close to such a massive object, its path will be bent,
and it will take longer for the light to reach us. Indeed, galaxy
clusters act as giant and spectacular magnifying glasses that not only magnify background galaxies but also create multiple images of them. I will talk about what happens when a massive star explodes as a luminous supernova in one of those
distant, multiply imaged galaxies. I will also describe a recent discovery that individual stars in galaxies more than halfway across the universe can become so highly magnified by galaxy clusters that we can see them one-by-one from Earth.
* Alumni from all academic majors are welcome.
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