Abell 33

The Diamond Ring Nebula

Formally Abell 33 or the even more catchy name PK238+34.1, the “diamond ring nebula” is a planetary nebula – that means it’s the gas blown off by a dying star, not too different from our own sun.

This one’s interesting due to its almost perfectly spherical shape, its cyan color from ionized Oxygen gas, and the foreground star that’s in just the right place to look like a diamond on a ring.

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