On This Day

On This Day

In Year 1875, 6 April after years of research scientist, inventor, engineer Alexander Graham Bell was granted a patent for the multiple telegraph, these telegraph was able to sent two signals at the same time. 

In Year 1924, 6 April team of aviators from the United States Army Air Service, took off with four planes to make the first successful circumnavigation around the world. The trip begins from Seattle it took 175 days, covering 44.342 km and ended in Seattle on 28 September 1924.

In Year 1973, 6 April NASA launched robotic space probe Pioneer 11, whit purpose to study planets Jupiter and Saturn, asteroid belt, solar wind, cosmic rays etc. Pioneer 11 gave NASA substantial and important data, but contact with the probe was lost on 30 September 1995.

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