afterglow

n. glow after sunset; glow light leaves after it is gone; warm memory

An afterglow is a broad high arch of whitish or rosy light appearing in the sky due to very fine particles of dust suspended in the high regions of the atmosphere. An afterglow may appear above the highest clouds in the hour of deepening twilight, or reflected from the high snowfields in mountain regions long after sunset. The particles produce a scattering effect upon the component parts of white light.
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Noun
1. a glow sometimes seen in the sky after sunset
(hypernym) atmospheric phenomenon
2. the pleasure of remembering some pleasant event; "he basked in the afterglow of his victory"
(hypernym) pleasantness

n.
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Synonyms and related words:
afterbirth, afterclap, aftercrop, aftereffect, aftergrowth, afterimage, aftermath, afterpain, aftertaste, air glow, balance, butt, butt end, by-product, candescence, candle ends, chaff, debris, detritus, end, fag end, filings, flush, fossil, gleam, glint, gloss, glow, holdover, husks, incandescence, leavings, leftovers, luster, odds and ends, offscourings, orts, parings, placenta, rags, refuse, relics, remainder, remains, remnant, residue, residuum, rest, roach, rubbish, ruins, rump, sawdust, scourings, scraps, secundines, shadow, shavings, sheen, shine, shininess, shining light, side effect, skylight, straw, stubble, stump, sunset glow, survival, sweepings, trace, track, trail, vestige, wake, waste,