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  2. Planet Nine - Wikipedia

    en.wikipedia.org/wiki/Planet_Nine

    Planet Nine is a hypothetical ninth planet in the outer region of the Solar System. [4] [2] Its gravitational effects could explain the peculiar clustering of orbits for a group of extreme trans-Neptunian objects (ETNOs), bodies beyond Neptune that orbit the Sun at distances averaging more than 250 times that of the Earth i.e. over 250 astronomical units (AU).

  3. Artemis program - Wikipedia

    en.wikipedia.org/wiki/Artemis_program

    NASA Habitable Mobility Platform based on the past Constellation Space Exploration Vehicle. The Pressurized Rover (PR) is a large, pressurized module used to enable crewed operation across large distances and live for multiple days. NASA had developed multiple pressurized rovers including what was formerly called the Space Exploration Vehicle (SEV

  4. Exploration Systems Architecture Study - Wikipedia

    en.wikipedia.org/wiki/Exploration_Systems...

    The Exploration Systems Architecture Study (ESAS) is the official title of a large-scale, system level study released by the National Aeronautics and Space Administration (NASA) in November 2005 of his goal of returning astronauts to the Moon and eventually Mars—known as the Vision for Space Exploration (and unofficially as "Moon, Mars and Beyond" in some aerospace circles, though the ...

  5. Nancy Grace Roman Space Telescope - Wikipedia

    en.wikipedia.org/wiki/Nancy_Grace_Roman_Space...

    High-Gain Antenna for Roman Space Telescope. The dish spans 5.6 feet (1.7 meters) in diameter and weighs 24 pounds (10.9 kilograms). The Roman project office is located at NASA's Goddard Space Flight Center in Greenbelt, Maryland, and holds responsibility for overall project management. GSFC also leads the development of the Wide-Field ...

  6. Transiting Exoplanet Survey Satellite - Wikipedia

    en.wikipedia.org/wiki/Transiting_Exoplanet...

    HD 21749 c is a planet described as "likely rocky", with about 89% of Earth's diameter and orbits the K-type main sequence star HD 21749 in about 8 days. The planet's surface temperature is estimated to be as high as 427 °C. Both known planets in the system, HD 21749 b and HD 21749 c, were discovered by TESS. HD 21749 c represents the 10th ...

  7. FreeFlyer - Wikipedia

    en.wikipedia.org/wiki/FreeFlyer

    FreeFlyer has been used to support many spacecraft missions, for mission planning analysis, operational analysis, or both. Specific mission examples include the International Space Station (ISS), [7] the JSpOC Mission System, [8] the Earth Observing System, [9] [10] Solar Dynamics Observatory (SDO), [11] and Magnetospheric Multiscale Mission (MMS).

  8. Aerocapture - Wikipedia

    en.wikipedia.org/wiki/Aerocapture

    Aerocapture uses a planet's or moon's atmosphere to accomplish a quick, near-propellantless orbit insertion maneuver to place a spacecraft in its science orbit. The aerocapture maneuver starts as the spacecraft enters the atmosphere of the target body from an interplanetary approach trajectory.

  9. Flyby (spaceflight) - Wikipedia

    en.wikipedia.org/wiki/Flyby_(spaceflight)

    Imagery collected by Voyager 2 of Ganymede during its flyby of the Jovian system Galileo spacecraft encounters asteroid 243 Ida. A flyby (/ ˈ f l aɪ b aɪ /) is a spaceflight operation in which a spacecraft passes in proximity to another body, usually a target of its space exploration mission and/or a source of a gravity assist (also called swing-by) to impel it towards another target. [1]