Sunday, 2 March 2014

Astronomy Scrapbook Monday 3rd March 2014

On This Day
March 3rd 1959 launch of Pioneer 4



Pioneer 4 was part of the Pioneer programme of probes to by pass the Moon. It passed the Moon by about 60,000 km. It was the first US satellite to enter orbit around the Sun. Contact was lost on March 6th 1959.

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