10 July

1962: On 10 July 1962, Telstar 1, the world's first geosynchronous communications satellite, was launched.

Its purpose was to relay television and telephone signals between the United States and Europe. When Telstar was put into service for the first satellite television broadcast, it made possible the first live television signals sent across the Atlantic. Viewers in France and the United Kingdom saw President Kennedy conduct a press conference, and audiences in the United States watched French singer Yves Montand and the changing of the guard at Buckingham Palace in London.

1910: On 10 July 1910, Johann Gottfried Galle died.

Galle was a German astronomer who, on 23 September 1846, was the first to observe the planet Neptune. The planet's existence had been predicted in the calculations of Leverrier. Leverrier had written to Galle asking him to search for the new planet at a predicted location.