A constellation is a group of stars, which seem to be forming different figures, letters, etc. at night. The term came from the Latin words con, which means together, and Stella, which means star. The ancient Babylonians, the Greeks and the Romans gave the names of their kings, queens, heroes and animals to these constellations. Some of the later found constellations were given the names of scientific instruments such as the Sextant, the Compass and the Microscope. Today, the astronomers recognize 88 constellations in the sky. It is not easy to make out in the sky the figures that suggested the early names.

All the constellations cannot be seen from one place or at the same period of the year. At different places and in different seasons we can see different constellations...