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 />
Pollux or Beta Geminorum (Bet Gem) is the brightest naked eye star in the constellation Gemini. With an apparent magnitude of 1.16, Pollux is the 17th brightest star in the entire sky (see: 50 Brightest Stars). Its absolute magnitude is 1.09 and its distance is 33.7 light years. The Equinox J2000 equatorial coordinates are RA = 07h 45m 18.9s, Dec = +28Â° 01' 34.