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  2. OSO 7 - Wikipedia

    en.wikipedia.org/wiki/OSO_7

    Because the resulting orbital apogee was ~572 km instead of the planned ~350 km for the nominal circular orbit, several times each day OSO 7 passed fairly deeply into the Van Allen radiation belts, so that bombardment by high energy protons made it somewhat radioactive. The activity then decayed slowly during other times of the day.

  3. Orbiting Solar Observatory - Wikipedia

    en.wikipedia.org/wiki/Orbiting_Solar_Observatory

    Dr. Nancy Roman with a model of OSO 1 (1962) OSO 1 diagram OSO 4 (1967). The Orbiting Solar Observatory (abbreviated OSO) Program was the name of a series of American space telescopes primarily intended to study the Sun, though they also included important non-solar experiments.

  4. Solar Dynamics Observatory - Wikipedia

    en.wikipedia.org/wiki/Solar_Dynamics_Observatory

    The detailed images recorded by SDO in 2011–2012 have helped scientists uncover new secrets about the Sun. The Solar Dynamics Observatory (SDO) is a NASA mission which has been observing the Sun since 2010. [4]

  5. Orbiting Astronomical Observatory - Wikipedia

    en.wikipedia.org/wiki/Orbiting_Astronomical...

    Artist's conception of OAO-1 in orbit Technicians in a clean room check out the OAO 2 before the mission’s 7 December 1968, launch. Artist's conception of OAO-B in orbit OAO-3 in the clean room The Orbiting Astronomical Observatory ( OAO ) satellites were a series of four American space observatories launched by NASA between 1966 and 1972 ...

  6. Cygnus OA-7 - Wikipedia

    en.wikipedia.org/wiki/Cygnus_OA-7

    OA-7, previously known as Orbital-7, is the eighth flight of the Orbital ATK uncrewed resupply spacecraft Cygnus and its seventh flight to the International Space Station (ISS) under the Commercial Resupply Services contract with NASA. [5] The mission launched on 18 April 2017 at 15:11:26 UTC. Orbital and NASA jointly developed a new space ...

  7. Comparison of orbital launch systems - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_orbital...

    Falcon 9 Block 5, the most prolific active orbital launch system in the world. This comparison of orbital launch systems lists the attributes of all current and future individual rocket configurations designed to reach orbit. A first list contains rockets that are operational or have attempted an orbital flight attempt as of 2024; a second list ...

  8. Advanced Composition Explorer - Wikipedia

    en.wikipedia.org/wiki/Advanced_Composition_Explorer

    Animation of Advanced Composition Explorer's orbit viewed from the Sun Earth · Advanced Composition Explorer ACE in orbit around the Sun–Earth L 1 point. Advanced Composition Explorer (ACE or Explorer 71) is a NASA Explorer program satellite and space exploration mission to study matter comprising energetic particles from the solar wind, the interplanetary medium, and other sources.

  9. Mercury-Atlas 7 - Wikipedia

    en.wikipedia.org/wiki/Mercury-Atlas_7

    By the end of the second orbit, he informed Mercury Control that most of the food was a mess and he would avoid touching it for the rest of the flight aside from taking a xylose capsule. [7] Earth horizon photo by Carpenter on-board Aurora 7. With each orbit sunrise, Carpenter also saw the "fireflies", though he observed them to be more like ...