Vanguard 2 was an Earth-orbiting satellite launched on 17 February 1959 by the Vanguard SLV 4 launch vehicle as part of Project Vanguard.
The satellite was designed to measure cloud-cover distribution over the daylight portion of its orbit. The spacecraft was a magnesium sphere 20 in (50.8 cm) in diameter. It contained two optical telescopes with two photocells.
Creative Commons licence: Video derives from the Universal International News archive which has been placed in the public domain.
. . thanks for upload . .good quality
WILLUSUBSCRIBE 1 year ago
good upload
blobrana 3 years ago