Yes, It is is the largest star discovered to date, the fact that we can see it is why we know about it.
VY Canis Majoris is about 4,900 light years from earth.
It is difficult to predict exactly when Canis Majoris, or Betelgeuse, will go supernova. It is expected to happen within the next 100,000 years, but could occur sooner or later. When it does happen, it is likely to be a spectacular event visible from Earth.
VY Canis Majoris cannot be seen from Earth with the naked eye. It is a red supergiant star located about 3,900 light-years away in the constellation Canis Major, and its apparent magnitude is around 8.9, which is too dim for unaided vision. Only through telescopes can it be observed, typically as a faint point of light.
VY Canis Majoris is kinda beside Wezen(Delta Canis Majoris.) Find where it says VY
Canis Major is a constilation. Cy canis majoris is a star.
VY Canis Majoris (Not Canis Majoris)
VY Canis Majoris has an absolute magnitude of -9.4.
A day on VY Canis Majoris is estimated to be around 1.5 Earth years due to its slow rotation.
As of today (2009) there is no star larger than VY Canis Majoris - a galaxy is larger than VY Canis Majoris though.
Canis Major
Canis Majoris is a red supergiant star that is one of the largest known stars in the universe. It is estimated to be about 1,000 times larger than the Sun in terms of volume, which means it is much larger than Earth. A single pixel representing Canis Majoris in an image of the Solar System would not even be visible when compared to Earth.
Scientists say that VY Canis Majoris is the biggest star we know so basically VY Canis Majoris is bigger than Kolob.