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  2. Spacetime diagram - Wikipedia

    en.wikipedia.org/wiki/Spacetime_diagram

    Unlike a regular distance-time graph, the distance is displayed on the horizontal axis and time on the vertical axis. Additionally, the time and space units of measurement are chosen in such a way that an object moving at the speed of light is depicted as following a 45° angle to the diagram's axes.

  3. Apollo 15 operations on the Lunar surface - Wikipedia

    en.wikipedia.org/wiki/Apollo_15_operations_on...

    Scott decided to stop there as it met the original objective of Scarp, which was to collect debris from near the rille. After taking a panorama of the site, Scott took some samples, finding them to be extremely soft. It is thought that the area around them was the youngest ever walked on by an astronaut. Moving on, they traveled to the rille.

  4. Astrophotography - Wikipedia

    en.wikipedia.org/wiki/Astrophotography

    Astronomical pictures, like observational astronomy and photography from space exploration, show astronomical objects and phenomena in different colors and brightness, and often as composite images. This is done to highlight different features or reflect different conditions, and makes the note of these conditions necessary.

  5. Sidereal time - Wikipedia

    en.wikipedia.org/wiki/Sidereal_time

    Picture of a poster clarifying the difference between a sidereal day and the more conventional solar day Animation showing the difference between a sidereal day and a solar day. Sidereal time ("sidereal" pronounced / s aɪ ˈ d ɪər i əl, s ə-/ sy-DEER-ee-əl, sə-) is a system of timekeeping used especially by astronomers.

  6. Space telescope - Wikipedia

    en.wikipedia.org/wiki/Space_telescope

    A space telescope (also known as space observatory) is a telescope in outer space used to observe astronomical objects. Suggested by Lyman Spitzer in 1946, the first operational telescopes were the American Orbiting Astronomical Observatory , OAO-2 launched in 1968, and the Soviet Orion 1 ultraviolet telescope aboard space station Salyut 1 in 1971.

  7. NASA's 2 stuck astronauts face more time in space with return ...

    lite.aol.com/news/science/story/0001/20241217/77...

    NASA's next crew of four was supposed to launch in February, followed by Wilmore and Williams' return home by the end of that month alongside two other astronauts. But SpaceX needs more time to prepare the brand new capsule for liftoff. That launch is now scheduled for no earlier than late March.

  8. Four civilians on a daring SpaceX mission complete the first ...

    www.aol.com/four-civilians-daring-spacex-mission...

    Editor’s note: Relive the SpaceX Polaris Dawn historic commercial spacewalk as it happened.. A four-person crew of civilians on board SpaceX’s Polaris Dawn mission unlocked the hatch of their ...

  9. Advanced Space Vision System - Wikipedia

    en.wikipedia.org/wiki/Advanced_Space_Vision_System

    The system uses regular 2D cameras in the Space Shuttle bay, on the Canadarm, or on the ISS along with cooperative targets to calculate the 3D position of an object. [ 1 ] Because of the small number of viewing ports on the station and on the shuttle, most of the assembly and maintenance is done using cameras, which do not give stereoscopic ...