Some kinds of stars are very unusual. They’re not necessarily at the
extreme values of some attribute (e.g. luminosity or mass), they’re just
weird.
Thorne-Zytkow objects
are like that. They’re named after the physicists Kip Thorne and Anna
Zytkow, who first suggested that they might exist. Their idea was that a
neutron star could spiral into the core of a red giant or supergiant.
Crazy, right? Yet one was recently found.
Sometimes, two big, yellow stars can orbit so close to each other
that matter falls between them, making the pair look like a giant cosmic
peanut. Only two such systems are known.
Przybylski’s Star is sometimes given as an example of an unusual star because its starlight is unlike that of any other star.
Astronomers measure the intensity of each wavelength as a way of
figuring out what the star is made of. It’s usually straightforward, but
scientists are still trying to understand the spectrum of Przybylski’s Star.
Source Article from http://feedproxy.google.com/~r/AscensionEarth2012/~3/pKNlWFQjq5A/the-most-unusual-stars.html
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