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  2. Kinetic bombardment - Wikipedia

    en.wikipedia.org/wiki/Kinetic_bombardment

    Project Thor was an idea for a weapons system that launches telephone pole-sized kinetic projectiles made from tungsten from Earth's orbit to damage targets on the ground. Jerry Pournelle created the concept while working in operations research at Boeing in the 1950s before becoming a science-fiction writer. [8] [9]

  3. Spacetime diagram - Wikipedia

    en.wikipedia.org/wiki/Spacetime_diagram

    A spacetime diagram is a graphical illustration of locations in space at various times, especially in the special theory of relativity.Spacetime diagrams can show the geometry underlying phenomena like time dilation and length contraction without mathematical equations.

  4. Atomic Clock Ensemble in Space - Wikipedia

    en.wikipedia.org/wiki/Atomic_Clock_Ensemble_in_Space

    Atomic Clock Ensemble in Space (ACES) is a project led by the European Space Agency which will place ultra-stable atomic clocks on the International Space Station. Operation in the microgravity environment of the ISS will provide a stable and accurate time base for different areas of research, including general relativity and string theory ...

  5. Firefly Alpha - Wikipedia

    en.wikipedia.org/wiki/Firefly_Alpha

    In 2015, NASA's Launch Services Program awarded Firefly Space Systems, the predecessor to Firefly Aerospace, a US$5.5 million Venture Class Launch Services contract to incentivize the development of Alpha, as part of a program to enable easier space access for the small satellite market. [20] [21] [clarification needed]

  6. Assembly of the International Space Station - Wikipedia

    en.wikipedia.org/wiki/Assembly_of_the...

    International Space Station mockup at Johnson Space Center in Houston, Texas. The space station is located in orbit around the Earth at an altitude of approximately 410 km (250 mi), a type of orbit usually termed low Earth orbit (the actual height varies over time by several kilometers due to atmospheric drag and reboosts).

  7. TIMED - Wikipedia

    en.wikipedia.org/wiki/TIMED

    TIMED Mission diagram (NASA) The Mesosphere, Lower Thermosphere and Ionosphere (MLTI) region of the atmosphere to be studied by TIMED is located between 60 and 180 kilometres (37 and 112 mi) above the Earth's surface, where energy from solar radiation is first deposited into the atmosphere. This can have profound effects on Earth's upper ...

  8. Why telling time on the moon is a conundrum for NASA - AOL

    www.aol.com/news/why-know-time-moon-183338834.html

    This week, learn why a lunar time scale is needed before humans return to the moon, meet the faces of Scotland’s ancient past, spy “salty licorice” cats, and more.

  9. Thor (rocket family) - Wikipedia

    en.wikipedia.org/wiki/Thor_(rocket_family)

    Thor was a US space launch vehicle derived from the PGM-17 Thor intermediate-range ballistic missile. The Thor rocket was the first member of the Delta rocket family of space launch vehicles. The last launch of a direct derivative of the Thor missile occurred in 2018 as the first stage of the final Delta II .