Sunday, November 12, 2023

The Ghosts of Star Gamma Cassiopeia

The Ghosts of Star Gamma Cassiopeia

Gamma Cassiopeiae shines high in northern autumn evening skies. It is the brightest spiky star in this telescopic field of view toward the constellation Cassiopeia. Gamma Cas shares the ethereal-looking scene with ghostly interstellar clouds of gas and dust, IC 59 (top left) and IC 63. About 600 light-years distant, the clouds are not actually ghosts. They are slowly disappearing though, eroding under the influence of energetic radiation from hot and luminous gamma Cas. Gamma Cas is physically located only 3 to 4 light-years from the nebulae. Slightly closer to gamma Cas, IC 63 is dominated by red H-alpha light emitted as hydrogen atoms ionized by the star's ultraviolet radiation recombine with electrons. Farther from the star, IC 59 shows proportionally less H-alpha emission but more of the characteristic blue tint of dust reflected star light. The cosmic stage spans over 1 degree or 10 light-years at the estimated distance of gamma Cas and friends.

Image Credit & Copyright: Guillaume Gruntz, Jean-François Bax 

Guillaume Gruntz's website:

Jean-François Bax's website:

Release Date: October 28, 2023

#NASA #Space #Astronomy #Science #Star #GammaCassiopeiae #GammaCas #Nebulas #Nebulae #IC59 #IC63 #Cassiopeia #MilkyWayGalaxy #Cosmos #Universe #Astrophotographer #Astrophotography #STEM #Education #APoD

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