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  2. Looming and similar refraction phenomena - Wikipedia

    en.wikipedia.org/wiki/Looming_and_similar...

    Looming of the Canadian coast as seen from Rochester, New York, on April 16, 1871. Looming is the most noticeable and most often observed of these refraction phenomena. It is an abnormally large refraction of the object that increases the apparent elevation of the distant objects and sometimes allows an observer to see objects that are located below the horizon under normal conditions.

  3. What happens if an astronaut floats off into space? - AOL

    www.aol.com/news/2018-02-08-what-happens-if-an...

    If that fails, saving an astronaut floating off into space might require several tethers hooked together, a SAFER, and, to be honest, a lot of luck. RELATED: Here's whats happening in space this year:

  4. Sleep in space - Wikipedia

    en.wikipedia.org/wiki/Sleep_in_space

    Sleeping in space requires that astronauts sleep in a crew cabin, a small room about the size of a shower stall. They lie in a sleeping bag which is strapped to the wall. [5] Astronauts have reported having nightmares and dreams, and snoring while sleeping in space. [6] Sleeping and crew accommodations need to be well-ventilated. [7]

  5. Bell's spaceship paradox - Wikipedia

    en.wikipedia.org/wiki/Bell's_spaceship_paradox

    Since the ships are moving with the same velocity in S′ before acceleration, the initial rest length in S is shortened in S′ by ′ = / due to length contraction. From the frame of S′, B starts accelerating before A and also stops accelerating before A. Due to this B will always have higher velocity than A up until the moment A is ...

  6. Effect of spaceflight on the human body - Wikipedia

    en.wikipedia.org/wiki/Effect_of_spaceflight_on...

    Fifty percent of Space Shuttle astronauts took sleeping pills and still got 2 hours less sleep each night in space than they did on the ground. NASA is researching two areas which may provide the keys to a better night's sleep, as improved sleep decreases fatigue and increases daytime productivity.

  7. Mooring - Wikipedia

    en.wikipedia.org/wiki/Mooring

    However, such lines do not float on water and they do tend to sink. In addition, they are relatively more expensive than other sorts of line. Some ships use wire rope for one or more of their mooring lines. Wire rope is hard to handle and maintain. There is also risk associated with using wire rope on a ship's stern in the vicinity of its ...

  8. Space launch - Wikipedia

    en.wikipedia.org/wiki/Space_launch

    Space launch involves liftoff, when a rocket or other space launch vehicle leaves the ground, floating ship or midair aircraft at the start of a flight. Liftoff is of two main types: rocket launch (the current conventional method), and non-rocket spacelaunch (where other forms of propulsion are employed, including airbreathing jet engines).

  9. Space colonization - Wikipedia

    en.wikipedia.org/wiki/Space_colonization

    There is no night in free space, and no clouds or atmosphere to block sunlight. Light intensity obeys an inverse-square law. So the solar energy available at distance d from the Sun is E = 1367/d 2 W/m 2, where d is measured in astronomical units (AU) and 1367 watts/m 2 is the energy available at the distance of Earth's orbit from the Sun, 1 AU ...