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  2. Lunar Gateway - Wikipedia

    en.wikipedia.org/wiki/Lunar_Gateway

    The Lunar Gateway, or simply Gateway, is a space stationwhich is planned to be assembled in orbit around the Moon. The Gateway is intended to serve as a communication hub, science laboratory, and habitation module for astronautsas part of the Artemis program. It is a multinational collaborative project: participants include NASA, the European ...

  3. Orbit of the Moon - Wikipedia

    en.wikipedia.org/wiki/Orbit_of_the_Moon

    The orbit of the Moon is a nearly circular ellipse about the Earth (the semimajor and semiminor axes are 384,400 km and 383,800 km, respectively: a difference of only 0.16%). The equation of the ellipse yields an eccentricity of 0.0549 and perigee and apogee distances of 362,600 km (225,300 mi) and 405,400 km (251,900 mi) respectively (a ...

  4. Lunar distance - Wikipedia

    en.wikipedia.org/wiki/Lunar_distance

    The lunar distance is on average approximately 385,000 km (239,000 mi), or 1.28 light-seconds; this is roughly 30 times Earth's diameter or 9.5 times Earth's circumference. Around 389 lunar distances make up an AU astronomical unit (roughly the distance from Earth to the Sun). Lunar distance is commonly used to express the distance to near ...

  5. Artemis program - Wikipedia

    en.wikipedia.org/wiki/Artemis_program

    e. The Artemis program is a Moon exploration program led by the United States' National Aeronautics and Space Administration (NASA), formally established in 2017 via Space Policy Directive 1. It is intended to reestablish a human presence on the Moon for the first time since the Apollo 17 mission in 1972. The program's stated long-term goal is ...

  6. Dragonfly (Titan space probe) - Wikipedia

    en.wikipedia.org/wiki/Dragonfly_(Titan_space_probe)

    Dragonfly. (Titan space probe) Dragonfly is a planned NASA mission to send a robotic rotorcraft to the surface of Titan, the largest moon of Saturn. It is planned to be launched in July 2028 and arrive in 2034. It would be the first aircraft on Titan and is intended to make the first powered and fully controlled atmospheric flight on any moon ...

  7. Lunar month - Wikipedia

    en.wikipedia.org/wiki/Lunar_month

    Lunar month. In lunar calendars, a lunar month is the time between two successive syzygies of the same type: new moons or full moons. The precise definition varies, especially for the beginning of the month. Animation of the Moon as it cycles through its phases, as seen from the Northern Hemisphere.

  8. Apollo program - Wikipedia

    en.wikipedia.org/wiki/Apollo_program

    Apollo program. The Apollo program, also known as Project Apollo, was the United States human spaceflight program carried out by the National Aeronautics and Space Administration (NASA), which succeeded in preparing and landing the first men [ 2] on the Moon from 1968 to 1972.

  9. Callisto (moon) - Wikipedia

    en.wikipedia.org/wiki/Callisto_(moon)

    Callisto ( / kəˈlɪstoʊ / kə-LIST-oh ), or Jupiter IV, is the second-largest moon of Jupiter, after Ganymede. In the Solar System it is the third-largest moon after Ganymede and Saturn 's largest moon Titan, and as large as the smallest planet Mercury. Callisto is, with a diameter of 4,821 km, roughly a third larger than Earth's Moon and ...