Sh2-155: The Cave Nebula
The data in this photo were taken through narrowband filters (which track the glow of ionized sulfer, hydrogen and oxygen brand and displays this data in different hues). The cave is near Cepheus in appearance in the sky and it is 10 light years across (2400 away from Earth). The radiation is most likely causing the collapse of cores and well as new ones being created within.
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