SPACE STATIONS
The International Space Station experiences sixteen of these every day, as it travels around the Earth at 5 miles per second.
What are sunrises/sunsets?
Skylab was the first space station to be equipped with one of these; the astronauts appreciated having one, although they could only use it once per week.
What is a shower?
The Soviet Salyut-3 was the only space station known to have been equipped with this type of military technology.
What is a gun?
This series of spacecraft has been carrying astronauts to orbit since the 1960's; after the Shuttle program ended in 2011, it was the only way to get to the ISS.
What is Soyuz?