Afterglow (noun)

1. A residual glow remaining in the sky after sunset or after a bright light has been switched off.
2. A feeling of warmth or contentment following a pleasant experience.

Origin:

The word "afterglow" comes from the combination of the word "after" meaning "following" and "glow" meaning "light.".

Examples:

1. The afterglow of the sunset was beautiful and serene.
2. He watched the afterglow of the fireworks with a smile on his face.
3. She felt the afterglow of the concert for days afterwards.
4. The afterglow of the bonfire was all that was left as the last embers died out.
5. The afterglow of their love was still strong even after they broke up.