Explanation:
Antares is a huge star.
In a class called red supergiant,
Antares is about 850
times the diameter of our own Sun, 15 times more massive, and 10,000 times brighter.
Antares is the brightest star in the constellation of Scorpius and one of the
brighter stars
in all the night sky.
Located about 550 light years away,
Antares
is seen on the left surrounded by a yellowish nebula of gas which it has itself expelled.
Radiation from Antares' blue stellar
companion helps cause the nebular gas to
glow.
Far behind Antares,
to the lower right in the
above image,
is the globular star cloud
M4, while the bright star on the far right is
Al Niyat.
