In Pictures: Fabulous space photos from NASA’s Hubble telescope

NASA’s Hubble telescope is celebrating 22 years as a space discovery icon

NASA said blue is typically an indicator of hot, young stars. In this case, however, the stellar oddities are aging, sun-like stars that have prematurely cast off their outer layers of material, exposing their extremely blue-hot cores. NASA said a astronomers were surprised when they spotted these stars because physical models show that only an unusual type of old star can be as hot and as bright in ultraviolet light.

Credit: NASA/REUTERS

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