What, exactly, is the definition of “microgravity”?
On the microgravity overview page we define the term Microgravity as: “Microgravity is a term used by scientists to mean “very little gravity.” The effects of gravity aboard an orbiting spacecraft like the space shuttle are reduced significantly compared to what one experiences on the ground…” “…The “gravity” part of the word “microgravity” is fairly obvious. The “micro” part comes from the Greek word “mikros,” meaning “small.” Commonly it is used in science to mean “one millionth,” however a “microgravity environment” is defined as one in which the apparent weight of a system is small compared to its actual weight on Earth. This effect is easily acheived in orbiting laboratories.” The interesting part of this question is that the gravity environment aboard the shuttle is actually constantly changing, as pumps turn on, fan motors whirr, the crew moves around, thrusters fire, and lots of other things happen. So, strictly speaking, one cannot say the gravity environment aboard the sh
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