Chapter 7 Vocabulary

Term Definition
astrobiology the study of the origin, development, distribution, and future of life in the universe.
organic refers to a class of chemical compound in living organisms that are based on carbon.
artificial satellite any human made object placed in orbit around a body in space.
rocket vehicle propelled by the exhaust made from burning fuel.
space probe an un-crewed vehicle that travels to and obtains information about objects in space.
microgravity where the force of gravity is so weak weightlessness occurs.
solar radiation harmful radiation from the sun.
AU Astronomical unit, mean distance of the earth from the sun: approximately 93 million miles.
ISS International space station is an artificial satellite constructed, by astronauts from 15 different nations, that orbits the Earth where people live and work for up to 6 months at a time. It has been continuously occupied since the year 2000.

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