| A | B |
|---|
| asteroid | any of the small planets with orbits between Mars and Jupiter |
| asterisk | a starlike mark that indicates a footnote |
| astrology | the study of the influence of the stars, the planets, and the moon on human behavior |
| astronaut | a person trained to make rocket flights in space. (Naut means sailor--so an astronaut is a "star-sailor") |
| astro | (from Greek word"aster") star |
| aster | a flower with pink, white, blue, or purple flowers, shaped like daisies and resemble stars |
| astrolabe | an instrument once used to measure the altitude of the stars |
| astronomer | one who studies the science of the stars and other heavenly bodies |
| astrophysics | the science of the physical properties and phenomena of the stars and planets |
