Its star 61 was the first extra-solar star to have its distance from Earth measured.
This constellation's so-called Fireworks Galaxy has been the source of more observed supernovae than any other. Its star 61 was the first extra-solar star to have its distance from Earth measured. Stars in this constellation also known as the Northern Cross include Ruchba and Albireo. Better-known, however, are the x-ray source X-1 and Deneb, its brightest star. For ten points, name this constellation, representing either the transformed Orpheus, or the form Zeus in the form of a swan.
This constellation's so-called Fireworks Galaxy has been the source of more observed supernovae than any other.
{Cygnus} (accept {Northern Cross} “Northern”)