Credit: ESA/Hubble & NASA
Acknowledgement: Jean-Christophe Lambry
Acknowledgement: Jean-Christophe Lambry
This new image, snapped by NASA/ESA Hubble Space Telescope, shows the
star HD 184738, also known as Campbell’s hydrogen star. It is a
Wolf-Rayet star — an evolutionary stage for stars with a mass of over 20
times that of our Sun, when they are rapidly blowing away material and
losing mass. This type of star is named after two French astronomers,
Charles Wolf and Georges Rayet, who first identified them in the
mid-nineteenth century.
Stars like HD 184738 are short-lived, very massive, and extremely
hot, with surface temperatures of up to 40 times higher than that of our
Sun. They are also very luminous, though as they predominantly emit in
the ultraviolet and X-ray parts of the spectrum, they may not appear to
be exceptionally bright. The star’s distinctive fiery red colour is
caused by its nitrogen content.
A version of this image was entered into the Hubble’s Hidden Treasures image processing competition by contestant Jean-Christophe Lambry.
