Astronomers were surprised when they discovered what appeared to be a star surrounded by an ultraviolet ring 16 years ago. It became known as the Blue Ring Nebula, located 6,300 light-years away from Earth in the Hercules constellation.
from CNN.com - RSS Channel - World https://ift.tt/3pFxswG
from CNN.com - RSS Channel - World https://ift.tt/3pFxswG
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