Yes.
the milky way galaxy
VY Canis Majoris is the largest star we know of, but most of the stars in the Milky Way are still uncharted, so there may be larger stars we have not found yet.
No. The sun is fairly ordinary in size. The largest known star is VY Canis Majoris.
VY Canis Majoris is not located in the constellation Canis Major. It is actually located in the constellation Canis Majoris. This star is one of the largest known stars in the galaxy.
Canis Major is a constilation. Cy canis majoris is a star.
VY Canis Majoris (Not Canis Majoris)
VY Canis Majoris, a red hypergiant in Canis Major, is the largest known star in the Milky Way Galaxy. It is about 3 x 109 kilometers (about 9 AU) in diameter, and located about 5 x 1016 kilometers (about 1.5 kpc) away from us.
VY Canis Majoris has an absolute magnitude of -9.4.
As of today (2009) there is no star larger than VY Canis Majoris - a galaxy is larger than VY Canis Majoris though.
Canis Major
Vy Canis Majoris is located approximately 3,840 light-years away from Earth.