"I only know a few," Harm warned shyly, pausing to unlace his boots and put them aside so that when he lay down beside Trick, he could curl his socked feet around his legs with impunity while he cuddled up to him. He started by pointing out the major ones, expecting Trick would know those because most people did. After that, he pointed out the planets visible tonight and then it was onto the lesser known clusters.
Despite his claim, Harm's continued naming of constellations after brief pauses of contemplation proved that he knew more than 'a few'. He had a naturally analytical mind, driven by boundless curiosity - his current project was teaching himself to play chess by reading books in his phone, learning the moves and understanding the consequences of each - and he'd pored over astronomical texts with increasing interest in his late teenage years. He knew what he was talking about.
The best part about it wasn't the naming, though. It was trying to be sure Trick was looking where he was supposed to be. What started out as some simple pointing soon became temples pressed together to attempt to direct his gaze, burgeoning laughter as descriptions became more rudimentary and stolen kisses when Harm lifted his head in a last ditch effort to stare at Trick and try to figure out where the fuck he was even looking, based on what he was describing.
"Okay, if you look down from Cassiopeia, there's a really bright star directly under. That's Capella. But if you look about in the middle of them and slightly to the right, there's another bright star. There? That's Mirphak and it's the centre of Perseus' body. Just let your eyes wander around there and you should be able to make him out," Harm advised, his arm extended and outlining the shape of Perseus as he knew it.
"He's like a Roman soldier and he's holding Medusa's head in his hand because he chopped it off - oh! Actually, Algol is the brightest star in the head bit but it goes brighter and duller because it's in a binary arrangement, so every couple of days another star orbits around it and dims it, isn't that cool? There are star systems with multiple stars in them - some up to five - and they all orbit around each other, shining brighter when it's their turn, staying together until they die. I've always thought that's kind of beautiful," he sighed dreamily, tucking his arm back in against Trick's side, his cheek perched on his shoulder so that he could mostly look up at the sky and seek the next star to talk about.