| Aldebaran |
an orange binary star in the constellation Taurus, having a combined magnitude of 0.9. |
| Algol |
an eclipsing binary star in the constellation Perseus, having a magnitude that varies between 2.3 and 3.4. |
| Alpha Centauri |
a double star in the constellation Centaurus, the closest star to the solar system, having a combined magnitude of -0.3. |
| Altair |
the brightest star in the constellation Aquila, having a magnitude of 0.8. |
| Andromeda |
an autumn constellation in the northern sky, located between Perseus and Pegasus, with which it shares the bright triple star Alpheratz, and containing a spiral galaxy. [1/2 definitions] |
| Antares |
a red binary star in the constellation Scorpius, having a combined magnitude of 1.0. |
| Aquarius |
a constellation located between Capricorn and Pisces. Aquarius is also called the Water Bearer. [1/3 definitions] |
| Aquila |
a summer constellation in the northern sky, located between Lyra and Capricornus and the bright star Altair; Eagle. |
| archer |
(cap.) the constellation or astrological sign of Sagittarius. [1/2 definitions] |
| Arcturus |
an orange star in the constellation Boötes, having a magnitude of zero. |
| Aries |
a constellation located between Pisces and Taurus. Aries is also called the Ram. [1/3 definitions] |
| Auriga |
a winter constellation in the northern sky, located between Perseus and Gemini and containing the bright triple star Capella and several star clusters; Charioteer. |
| Betelgeuse |
a red variable star in the constellation Orion, having a magnitude of 0.7. |
| Big Dipper |
the seven brightest stars of the constellation Ursa Major. These stars form a shape that looks like a ladle, or dipper. |
| Boötes |
a spring constellation in the northern sky, located between Corona Borealis and Virgo and containing the bright, orange star Arcturus; Herdsman. |
| bull1 |
(cap.) the constellation or astrological sign of Taurus. [1/9 definitions] |
| cancer |
(capitalized) a constellation located between Gemini and Leo. Cancer is also called the Crab. [1/4 definitions] |
| Canis Major |
a constellation in the northern sky that contains Sirius, the brightest of all stars. Canis Major means "Big Dog" in Latin. |
| Canis Minor |
a constellation in the northern sky. Canis Minor means "Little Dog" in Latin. |
| Capella |
a yellow triple star in the constellation Auriga, having a magnitude of 0.1. |
| Capricorn |
a constellation between Sagittarius and Aquarius. Capricorn is also called the Goat. [1/3 definitions] |