circumlunar


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circumlunar

[¦sər·kəm′lü·nər]
(astronomy)
Around the moon; generally applied to trajectories.
References in periodicals archive ?
Verne's 1865 fictional trip around the Moon had several startling similarities to Apollo 8's circumlunar trip in December 1968.
The Webb fire-breathing conversation was incident to Phillips's attempt to convince him that changing the mission profile of Apollo 8 from an Earth orbit mission to a circumlunar orbit was a good idea.
Paine convinced Webb to approve the Apollo 8 circumlunar effort pending the successful completion of the Apollo 7 mission.
Moving out of the crippled CSM into the LM, the crew used the LM descent engine to adjust their trajectory to a circumlunar return to Earth.
The second was the Proton-launched circumlunar ZOND (a name meaning sounder) human-precursor tests.
The next day Webb followed this up with another letter to Johnson where he stated: "The importance that I have attached to the successful circumlunar flight of the Soviet Zond V derives not from the feat itself but from the confirmation it gives to accumulating mission successes as indications that the USSR is thrusting forward across a broad spectrum." Webb continued: "As I told the press, the mission represented in my view 'the most important demonstration to date of all the capabilities required for operations around the Earth and outward to the moon and planets--in other words, all the capabilities for any purpose in space." (38)
But they were in essence viewing the issue from a different perspective than Webb--solely in terms of achieving the immediate goals of a circumlunar flight and a manned lunar landing.
(40) Neither the Apollo 8 circumlunar flight nor the Apollo 11 Moon landing happened on his watch.
Kennedy's announced his commitment to land a man on the Moon by the end of the decade, a CIA intelligence estimate concluded: "Contingent upon successes with manned earth satellites and the development of large booster vehicles, the Soviets are believed capable of a manned circumlunar flight with reasons chance of success in 1966; of recoverable manned lunar satellites in 1967; and of lunar landings and return to earth by about 1970." [16]
In 1967, an NIE noted that as early as 1965 the CIA has estimated that "The Soviet manned lunar landing program was probably not intended to be competitive with the Apollo program as then projected, i.e., aimed at the 1968-1969 time period." CIA analysts, however, still believed that the Soviet Union would attempt a circumlunar flight before the U.S., noting that it "Would pay important dividend in terms of prestige, and could be a means to offset some of the propaganda value of the US Apollo program." [26]
NASA asked the intelligence community to redouble efforts to obtain and review data for evidence of a circumlunar flight.
An attitude control failure put the spacecraft into a ballistic return that would have killed any cosmonauts aboard, but NASA officials wondered if the Soviets were planning a circumlunar flight.