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Asterisms vs. Constellations
Asterism - Easily
recognizable pattern of
stars.
Can be within a
constellation
(e.g., Big Dipper in
Ursa Major)
OR
From more than one
constellation
(e.g., Summer Triangle
– one star each from
Lyra, Cygnus and
Aquila)
Centaurus
Constellations
Constellations are now
defined by the IAU as 88
areas of the sky. They
usually contain the old
star groups from earlier
times.
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