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In this section, we show stars and binaries. When we observe through X-ray wavelengths, it turns out that unexpectedly active phenomena take place around a white dwarf, a neutron star, a black hole, or even a protostar as well as an ordinary star.
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In this section, we show stars and binaries. When we observe through X-ray wavelengths, it turns out that unexpectedly active phenomena take place around a white dwarf, a neutron star, a black hole, or even a protostar as well as an ordinary star.
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 Spectral Classification and HR Diagram |
 Normal Star |
 Protostar |
 Variable Star |
 Binary Activity |
 Cataclysmic Variables |
 X-ray Binary |
 Evolution of Stars |
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