How to use in-sentence of “cygnus”:
+ The Perseus Spiral Arm, with a radius of about 10,700 parsecs, is between the minor Cygnus ArmCygnus and Perseus.
+ It is over 580 light years away in the Cygnus Cygnus constellation.
+ This star is a part of the Cygnus OB2 association, which is 1.74±0.2kpc away.
+ The North America nebula Cygnus constellation.
+ Chi Cygni is a Mira variable star located in the Cygnus constellation.
+ The astronomer Ptolemy listed Cygnus in the 2nd century when he made a list of constellations.
+ Although it is huge, Cygnus OB2 is hidden behind a massive dust cloud known as the Cygnus Rift.
+ The best-known example of a star with an invisible companion is Cygnus X-1, in which the visible star’s companion appears to be a black hole.
