Canis Major is a constilation. Cy canis majoris is a star.
VY Canis Majoris is kinda beside Wezen(Delta Canis Majoris.) Find where it says VY
vy canis majoris in the constellation canis major
Canis Majoris is not a recognized astronomical term. It may be a confusion between two separate astronomical terms: "Canis Major" which is a constellation in the southern hemisphere, and "Canis Majoris" which may refer to a hypothetical supergiant star in the constellation Canis Major, although this specific term is not commonly used in astronomy.
VY Canis Majoris belongs in the constellation Canis Major
VY Canis Majoris (Not Canis Majoris)
== == Sirius is the Dog Star, the brightest star (after the sun) in the sky.
The name "Vy Canis Majoris" comes from the star's location in the constellation Canis Major and its classification as a "variable" star. "Vy" is simply a designation for variable stars while "Canis Majoris" indicates its location in the constellation.
Canis Major contains the brightest star, Alpha Canis Majoris, or Sirius A.
Sirius = Alpha Canis Majoris. In other words, it is the brightest star in the constellation Canis Major, or Big Dog.
Sirius (brightest star in the night sky, 6th closest star to the sun, also a binary star) Canis Majoris VY (largest star known to man)
"Canis Major" is the Latin name used for the constellation "the Greater Dog". The main stars have Greek letters in the Bayer system, combined with the constellation name. When naming a star in a constellation, the genitive (possessive) case of the Latin constellation name is used. For Canis Major that is "Canis Majoris". For example, Sirius is Alpha Canis Majoris in the Bayer star naming system. It means "Star A of the greater dog". (Sirius is also called the 'Dog Star'.)
As of today (2009) there is no star larger than VY Canis Majoris - a galaxy is larger than VY Canis Majoris though.