After I mentioned “bella sorge la speranza” yesterday, Thadieu kindly sent me a performance of the opera it’s from, Arianna in Creta HWV 32. (It’s a radio broadcast from London in 2009, with the Academy of Ancient Music; she wrote about it here.)
The aria is part of the final scene of the opera. Here’s a short clip from that performance, with Miah Persson as Arianna and Kristina Hammarström as Teseo. They sing a duet, “mira adesso questo seno,” there’s a brief section of recitative and then Teseo has the “bella sorge” aria and then the aria is recapped as a chorus at the end.
Warning: it WILL get stuck in your head. Do not fight the Handel.