This Day, That Year – December 23
English astronomer, John Flamsteed, observed Uranus on this day in 1690 without realizing it was undiscovered. Did you know that: • Giovanni Cassini discovered Rhea, a satellite of Saturn, on this day in 1672• Richard Arkwright, inventor of the spinning frame, was born on this day in 1732• Thomas Edison patented a magneto-electric machine on […]
