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Salome 3 year s ago
So where did all that energy come from that produced those stars since energy can neither be created or destroyed, only changes.
The Cat's Eye Nebula is a planetary nebula located 3,000 light-years away from Earth.
A planetary nebula is an expanding, ring-shaped cloud of gas that forms around an aging star. Several billion years from now, the Sun will experience this phase of stellar evolution.