Ernest Opik, an Estonian astronomer based at the Astronomical Observatory in Tartu from 1921-1944, commenced research on the frequencies and speeds of meteors and comets in the 1920s. In 1932, Opik ...
Three comets (C/1618 Q1, C/1618 V1, and C/1618 W1) were observed in 1618, all visible to the naked eye. C/1618 Q1, first observed in August over Hungary, marks the first known telescopic observation ...
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