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36. Sun
One thing Castiel missed about being an angel was the ability to look up into the massive, flaming ball of gas called the Sun and pick out every little detail, every tiny flare and corona. Now he couldn't even look near it without his eyes tearing and stinging!
"What's up, Cas?" Dean said when he found Castiel sitting outside, staring up at the brilliant blue sky.
"Did you know that the Sun is over four and a half billion years old?" Castiel said. Dean blinked and sat down.
"Where'd that come from?" he said. Castiel just shrugged.
"Nothing lasts forever," he sighed. "After approximately five billion years, the Sun will eventually burn through all of its hydrogen fuel and then begin to expand for another hundred million years as it burns its helium. It will expand and engulf everything around it. Mercury…Venus…Earth…"
"Uh, okay…"
"I wonder why Father would create things that are only destined to be destroyed," Castiel mused. "All things must fall apart. I suppose it's unavoidable. Maybe Father intended for a lesson to be learned from this."
"What's that?" Dean said, wondering just what was going through Castiel's mind. Castiel put a hand on Dean's arm.
"To appreciate what you have while you have it," he said. "Because everything will crumble and fall eventually."
There was a silence.
"You're such a nerd, Cas," Dean snorted. Castiel just glared at him for ruining the moment.