A Ranger plan (Ranger program) is a moon probe plan of National Aeronautics and Space Administration. I photographed the proximity photograph of the month by a lunar probe. The plan was started in 1959, and nine engines were launched.
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The United States of America explored the aggressive moon as part of the space development race from 1950s through 1960s. Following a lunar probe of the Pioneer Project, an exploration plan including the proximity photography of the month was started in 1959 and was named a Ranger plan. The plan was divided into three phases from block 1 to block 3.
The space probe was comprised of a high sensitive antenna, solar battery, six cameras. I was going to drop a landing capsule equipped with a seismometer on the moon with block 2, but succeeded neither.
The result of this plan was inherited for a following Surveyor plan.
For a stage to perform the performance test of the space probe, Ranger 1 and 2 were launched. I was going to perform the examinations of the posture control system on earth circular orbit, but I failed in orbit injection and was able to examine none of them two enough.
5 was launched as block 2 by 3. Although I left it, in the earth circular orbit, 3 and 5 did not arrive at the moon by the trouble of the apparatus, and 4 did not transmit observation result. It was a plan to let I separated a capsule, and the surface of the moon make a soft-landing right before the space probe body collided on the surface of the moon, but all were over for failure.
Four planes from 6 to 9 were launched from 1964 through 1965. Although an apparatus broke down, 6 achieved complete movement after 7. I transmitted a detailed image to the earth until it collided in a month and thereby succeeded in the close-up of the month. In addition, block 3 was not equipped with a landing capsule, and the space probe which finished observation was a plan lost by the collision with the month.
|Name||Launching||The success or failure||Result|
|Ranger 1||August 23, 1961||Failure||Orbit injection failure|
|Ranger 2||November 18, 1961||Failure||Launching failure|
|Ranger 3||January 26, 1962||Failure||It does not collide in a month|
|Ranger 4||April 23, 1962||Failure||The first lunar arrival in the United States |
It collided in a month, but it is failed by the transmission of data
|Ranger 5||October 18, 1962||Failure||It does not collide in a month|
|Ranger 6||January 30, 1964||Failure||It collided in a month, but I observe it, and it is failed by the trouble of the camera|
|Ranger 7||July 28, 1964||Success||It collides after observation success in the known sea|
|Ranger 8||February 17, 1965||Success||After observation success static; collide in that sea|
|Ranger 9||March 21, 1965||Success||It collides in an Alfons's crater after observation success|
This article is taken from the Japanese Wikipedia Ranger plan
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