Optical photo of the visual binary star Almach

Optical photo of the visual binary star Almach

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Credit: JOHN SANFORD/SCIENCE PHOTO LIBRARY

Caption: The visual binary star Almach, also known as Gamma Andromedae, is the third brightest star in the constellation of Andromeda. Although Almach is a triple star system, the third component is too faint to be seen. The major component of the system, Almach A, is an orange giant star (spectral type K3 II). Almach B is a smaller, greenish star (spectral type AOp), which shows up with a blue tinge in this photograph. Almach is located 260 light-years from Earth.

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Keywords: almach, astronomy, binary, binary star, cosmology, gamma andromedae, orange giant, orange giant star, science, star, stellar

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