Changes

:The Pioneer Venus Multiprobe, which was launched on Aug. 8, 1978 and reached Venus on Dec. 9, 1978, was made of 5 separate probes: the probe transporter (referred to as the Bus), a large atmospheric entry probe (called Sounder), and three small probes. The Sounder released from the Bus on Nov. 15, 1978. The three smaller probes released on Nov. 19, 1978. The probes sent data to Earth as they descended toward the surface.<ref>{{cite web|url=https://www.nasa.gov/mission_pages/pioneer-venus/index.html|title=NASA - Pioneer Venus|accessdate=2019-09-01|publisher=nasa.gov|date=2007-11-23|author=Jim Wilson}}</ref>

:The Pioneer Venus Multiprobe, which was launched on Aug. 8, 1978 and reached Venus on Dec. 9, 1978, was made of 5 separate probes: the probe transporter (referred to as the Bus), a large atmospheric entry probe (called Sounder), and three small probes. The Sounder released from the Bus on Nov. 15, 1978. The three smaller probes released on Nov. 19, 1978. The probes sent data to Earth as they descended toward the surface.<ref>{{cite web|url=https://www.nasa.gov/mission_pages/pioneer-venus/index.html|title=NASA - Pioneer Venus|accessdate=2019-09-01|publisher=nasa.gov|date=2007-11-23|author=Jim Wilson}}</ref>

*The '''Surveyor probes''' (1966 - 1968) were the first U.S. spacecraft to land safely on the Moon.  The main objectives of the Surveyors were to obtain close-up images of the lunar surface and to determine if the terrain was safe for manned landings. Each Surveyor was equipped with a television camera. In addition, Surveyors 3 and 7 each carried a soil mechanics surface sampler scoop which dug trenches and was used for soil mechanics tests and Surveyors 5, 6, and 7 had magnets attached to the footpads and an alpha scattering instrument for chemical analysis of the lunar material.<ref>{{cite web|url=https://nssdc.gsfc.nasa.gov/planetary/lunar/surveyor.html|title=Surveyor (1966 - 1968)|accessdate=2019-09-01|publisher=nssdc.gsfc.nasa.gov}}</ref>

*The '''Surveyor probes''' (1966 - 1968) were the first U.S. spacecraft to land safely on the Moon.  The main objectives of the Surveyors were to obtain close-up images of the lunar surface and to determine if the terrain was safe for manned landings. Each Surveyor was equipped with a television camera. In addition, Surveyors 3 and 7 each carried a soil mechanics surface sampler scoop which dug trenches and was used for soil mechanics tests and Surveyors 5, 6, and 7 had magnets attached to the footpads and an alpha scattering instrument for chemical analysis of the lunar material.<ref>{{cite web|url=https://nssdc.gsfc.nasa.gov/planetary/lunar/surveyor.html|title=Surveyor (1966 - 1968)|accessdate=2019-09-01|publisher=nssdc.gsfc.nasa.gov}}</ref>