fulgent
Shining brilliantly; radiant.
And univerſally, the greateſt and moſt fulgent tails always ariſe from Comets, immediately after their paſſing by the neighbourhood of the Sun.
Where it comes from
From Middle English fulgent, from Latin fulgēns. By surface analysis, Latin fulg(ere) + -ent.
Adapted from the Wiktionary entry fulgent (CC BY-SA 4.0).