noun
Cygnus; the Swan
The constellation Cygnus, known as the Swan. Used in astronomical contexts.
白鳥座は夏の夜空で見つけやすい星座です。
Cygnus is a constellation that is easy to find in the summer night sky.
From 白鳥 (はくちょう, 'swan') + 座 (ざ, 'constellation'). The name reflects the constellation's shape resembling a swan.