Explanation: Adrift in the rich star fields of the constellation Cygnus, this lovely, symmetric bubble nebula was only recently recognized and may not yet appear in astronomical catalogs.

• 说明：漂泊在星云富集的天鹅座内，这个可爱、形状对称的泡泡星云最近才被发现，所以不会出现在天文星云列表中。