Cygnus is a northern
constellation on the plane of the
Milky Way, deriving its name from the
LatinizedGreek word for
swan.
[1] Cygnus is one of the most recognizable constellations of the northern summer and autumn, and it features a prominent
asterism known as the
Northern Cross (in contrast to the
Southern Cross). Cygnus was among the 48 constellations listed by the 2nd century astronomer
Ptolemy, and it remains one of the 88 modern constellations.Cygnus contains
Deneb (ذنب, translit.
ḏanab, tail) – one of the
brightest stars in the night sky and the most distant
first-magnitude star – as its "tail
star" and one corner of the
Summer Triangle.
[1] It also has some notable X-ray sources and the giant
stellar association of
Cygnus OB2.
[2]Cygnus is also known as the Northern Cross. One of the
stars of this association,
NML Cygni, is one of the
largest stars currently known. The constellation is also home to
Cygnus X-1, a distant X-ray binary containing a supergiant and unseen massive companion that was the first object widely held to be a
black hole. Many
star systems in Cygnus have known planets as a result of the
Kepler Mission observing one patch of the sky, an area around Cygnus.Most of the east has part of the
Hercules–Corona Borealis Great Wall in the
deep sky, a giant
galaxy filament that is the largest known structure in the observable universe, covering most of the northern sky.
Source Wikipedia.
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