Space, or "Outer Space" is all the vacuous expanse that exists outside of Earth's atmosphere and between celestial objects.

Asked by Jaquelin Jast in Space, Planet Mars

What is NASA’s MAVEN spacecraft studying?

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MAVEN (Mars Atmosphere and Volatile EvolutioN) is studying Mars’ ionosphere, a very high level of the atmosphere, to learn more about certain ways radio waves are interrupted. Earth’s ionosphere is too low for satellites and too high for aircraft, so the research heretofore has been limited. On Mars, however, satellites like MAVEN are able to orbit in the ionosphere and collect valuable data about concentrated layers of electrically charged gas, which had never before been observed on another planet. This research is ongoing, and a paper about it was published Feb. 3, 2020.
Asked by Henry Feeney in Physics, International Space Station, Space

What happens when you boil water in space?

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In microgravity environments, boiling works very differently than it does on Earth. Under our gravity conditions, hotter parts of the liquid rise, while cooler parts sink. When vapor bubbles begin to form, they get shot upward, creating that classic "rolling boil." In space, though, heated liquid doesn't rise, so it just sits next to the heater and gets hotter. Likewise, as bubbles of vapor form, they don't rise to the surface. Instead, they form one big bubble that moves through the liquid. Sometimes, that big bubble sticks to the heat source, preventing the rest of the liquid from boiling. Other times, the liquid doesn't boil at all. Astronauts aboard the International Space Station have gotten liquids up to 160 degrees Kelvin above their normal boiling temperatures, and since "superheating" a liquid like that can be dangerous, they couldn't heat it any more than that for safety reasons. All that's to say that microgravity makes hot liquids behave weirdly, and scientists don't have it all figured out.
Asked by Vortex9k in Space, UFOs, Area 51

What is space force?

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A space force is a military branch that prepares for or conducts space warfare. As of January 2020, the only nation with an independent space force is the United States, which established the United States Space Force in December 2019.

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