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Portal:Spaceflight/Selected article/Week 16 2007 Source: en.wikipedia.org/wiki/Portal:Spaceflight/Selected_article/Week_16_2007

Black Brant XII

A sounding rocket, sometimes called a research rocket, is an instrument-carrying suborbital rocket designed to take measurements and perform scientific experiments during its flight. The origin of the term comes from the nautical term to take a sounding, meaning to take a measurement. (more...)