Other causes of valve disease include: 1  Deposits of calcium (calcification) in parts of the valve. 2  A floppy valve, which is a common cause of mild mitral valve regurgitation. 3  Some congenital heart problems. 4  Infection of the valve (infective endocarditis). 5  A complication of various uncommon diseases.
exists and is an alternate of . Castor is a variable star and also a quadruple star system, and has a spectral class of A1/A2 giving it a colour of white to white blue. Castor is a variable star and also a quadruple star system, and has a spectral class of A1/A2 giving it a colour of white to white blue. See link for more information.  <br /><br /> See link for more information. Castor is a variable star and also a quadruple star system, and has a spectral class of A1/A2 giving it a colour of white to white blue. <br /><br />
VY Canis MAjoris is a star that is 2100 times the mass of our own sun, and it is the largest star discovered to date.Y Canis Majoris is about 2,100 solar radii, it is possibly the largest known star and also one of the most luminous known. It is located about 1.5 kiloparsecs (4.6Ã1016 km) â¦ or about 4,900 light years away from Earth.