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  2. STS-51-F - Wikipedia

    en.wikipedia.org/wiki/STS-51-F

    The flight marked the first time the European Space Agency (ESA) Instrument Pointing System (IPS) was tested in orbit. This unique pointing instrument was designed with an accuracy of one arcsecond. Initially, some problems were experienced when it was commanded to track the Sun, but a series of software fixes were made and the problem was ...

  3. Space Shuttle abort modes - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_abort_modes

    An orbit near the craft's planned orbit was established, and the mission continued despite the abort to a lower orbit. [7] [8] The Mission Control Center at Johnson Space Center observed an SSME failure and called "Challenger-Houston, abort ATO." The engine failure was later determined to be an inadvertent engine shutdown caused by faulty ...

  4. Free-return trajectory - Wikipedia

    en.wikipedia.org/wiki/Free-return_trajectory

    Sketch of a circumlunar free return trajectory (not to scale), plotted on the rotating reference frame rotating with the moon. (Moon's motion only shown for clarity) In orbital mechanics, a free-return trajectory is a trajectory of a spacecraft traveling away from a primary body (for example, the Earth) where gravity due to a secondary body (for example, the Moon) causes the spacecraft to ...

  5. What went wrong with Boeing's spaceship? - AOL

    www.aol.com/news/went-wrong-boeings-spaceship...

    NASA and Boeing have been monitoring two issues with the Starliner spacecraft: one with a set of thrusters and the other involving helium leaks in the propulsion system.

  6. Launch window - Wikipedia

    en.wikipedia.org/wiki/Launch_window

    Animation of InSight 's trajectory InSight · Earth · Mars Mars launch windows and distance from Earth In the context of spaceflight, launch period is the collection of days, and launch window is the time period on a given day, during which a particular rocket must be launched in order to reach its intended target.

  7. Boeing Orbital Flight Test - Wikipedia

    en.wikipedia.org/wiki/Boeing_Orbital_Flight_Test

    This delay resulted in an abnormal orbit and excessive fuel use. The decision was made to scratch the ISS rendezvous/docking since the spacecraft burned too much fuel to reach orbit even after Mission control center fixed the MET clock issue. NASA and Boeing officials placed the spacecraft in a different orbit and the entire flight plan had to ...

  8. Mean anomaly - Wikipedia

    en.wikipedia.org/wiki/Mean_anomaly

    In celestial mechanics, the mean anomaly is the fraction of an elliptical orbit's period that has elapsed since the orbiting body passed periapsis, expressed as an angle which can be used in calculating the position of that body in the classical two-body problem.

  9. Fix problems signing in to AOL Mail

    help.aol.com/articles/fix-problems-signing-in-to...

    Fix problems signing in to AOL Mail While most sign in problems can stem from password issues, you might also get blank or missing screens, or various errors when trying to sign in. No matter the problem you're experiencing, the following troubleshooting steps should help you get back in your AOL Mail quickly.