○○○nebula⪢⪢
The solar system came into being about 4.5 billion years ago when a cloud of interstellar gas and dust collapsed resulting in a solar nebula, a swirling disk of material that collided to form the solar system.
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◎◎◎nemesis⪢⪢
On the one hand, nemesis can be your enemy. So somebody is your sworn enemy, they are your nemesis.
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