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 />
Gemini. Gemini is a constellation in the northern hemisphere. Its name means twins in Latin and refers to the mythical twins Castor and Polydeuces (Pollux in Latin), also known as the Dioscuri.he two brightest stars in Gemini, [3940] alpha and [3938] beta Geminorum, are better known as Castor and Pollux, and represent the twins' heads. Both are among the brightest stars in the night sky. [3940] alpha Geminorum, Castor, is a visual binary composed of two separate binary stars.