Stars Constellation Facts
1) A simple definition of a constellation is a group of stars which form a pattern in the night sky.2) The official definition is an area of the sky with defined boundaries, all stars and any other objects within
that boundary are considered part of the constellation.
3) There are 88 official constellations which are recognized by the International Astronomical Union.
4) Some constellations are only visible in the northern hemisphere, while others are only visible in the
southern hemisphere.
5) Constellations that are visible in both hemispheres may appear upside down in the southern hemisphere.
6) A few constellations can be viewed all year long but most are seasonal and can only be viewed at certain times of the year.
7) Distant galaxies and nebulae also form parts of constellations.
8) Asterisms are groups of stars that form patterns but are actually part of one or multiple constellations, the Big Dipper is the most famous example of an asterism.
9) The sun is the only known star in our galaxy which is not part of a constellation.
Understanding Star Charts
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