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Gemini IV. Gemini 4 (officially Gemini IV) [3] was the second crewed spaceflight in NASA 's Project Gemini, occurring in June 1965. It was the tenth crewed American spaceflight (including two X-15 flights at altitudes exceeding 100 kilometers (54 nmi)). Astronauts James McDivitt and Ed White circled the Earth 66 times in four days, making it ...
The Gemini astronauts were sixteen pilots who flew in Project Gemini, NASA's second human spaceflight program, between projects Mercury and Apollo. Carrying two astronauts at a time, a senior command pilot and a junior pilot, the Gemini spacecraft was used for ten crewed missions. Four of the sixteen astronauts flew twice.
e. Project Gemini (IPA: / ˈdʒɛmɪni /) was the second United States human spaceflight program to fly. Conducted after the first American crewed space program, Project Mercury, while the Apollo program was still in early development, Gemini was conceived in 1961 and concluded in 1966. The Gemini spacecraft carried a two-astronaut crew.
NASA astronaut James McDivitt, who commanded Gemini 4, the first U.S. mission to conduct a spacewalk, before leading Apollo 9, the first test flight of the Apollo moon lander, has died at age 93.
Ed White (astronaut) Edward Higgins White II (November 14, 1930 – January 27, 1967) was an American aeronautical engineer, United States Air Force officer, test pilot, and NASA astronaut. He was a member of the crews of Gemini 4 and Apollo 1. After graduating from West Point in 1952 with a Bachelor of Science degree, White was sent to flight ...
The Hand-Held Maneuvering Unit (HHMU), also known as the maneuvering gun, or informally as "the zip gun", was the first astronaut propulsion unit. It was first used by astronaut Ed White during the first American "spacewalk" (extra-vehicular activity, EVA), on Gemini 4, June 3, 1965. Different models of HHMU were present on Gemini 4, 8, 10, and ...
The first in-flight repair of the Space Shuttle. The landmass in the backdrop is the Bari region of Somalia. Extravehicular activity (EVA) is any activity done by an astronaut in outer space outside a spacecraft. In the absence of a breathable Earthlike atmosphere, the astronaut is completely reliant on a space suit for environmental support.
The Manned Maneuvering Unit (MMU) is a propulsion backpack which was used by NASA astronauts on three space shuttle missions in 1984. The MMU allowed the astronauts to perform untethered EVA spacewalks at a distance from the shuttle. The MMU was used in practice to retrieve a pair of faulty communications satellites, Westar VI and Palapa B2.