Births
1801 - Joseph Plateau, Belgian physicist
1861 - Artur Gavazzi, Croatian geographer
1914 - Raymond Davis Jr., American physicist and Nobel Prize laureate
Deaths
1831 - Jean-Louis Pons, French astronomer
1960 - Abram Ioffe, Russian physicist
1984 - Martin Ryle, English radio astronomer and Nobel Prize laureate
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An Einstein Ring is one of those freaky relativistic predictions that can't possibly be true unless Einstein was right.