Thank you for the ask! I had a lot of fun writing this one. It’s short, but sweet ^^
Astronomy, being almost the youngest out of his whole family, tried to act like he wasn't. He just feels like, being the youngest, everyone believes that he is a baby and needs to treat him as such. Because of that, he has decided that he would grow to be the smartest out of his family!
He started to study space, study planets, and everything else that he could ever get his hands on. Like, there was one star that is located in the Scutum-Centaurus spiral arm. It's a pulsar star; a type of star whose spin causes its light to pulse and it's very slow and lazy because sometimes, it'll disappear! It just stops. Then there was another one, called Swift and it got eaten by a black hole.
He would keep going on about stars for the next hour, so let's skip that and get back to the fic.
Astronomy would sometimes even ask Alphys from different worlds about different things, trying to learn even more.
He wanted to know more than just stars and space! That wouldn't impress anyone they would think haha his name is Astronomy, and he likes stars. How original!
It was tiring.
He didn't even really... want to do it sometimes. Sometimes he just wanted to be able to relax, eat weird random food and rest but he couldn't allow himself to do that.
Plus, having to file down his teeth pretty much every day was tiring as well. He got his fathers sharp teeth, and as COOL as some people think that that would be, it was bad for him.
Today was a new day, and he was going over to see his datemate! Y/n. When he first got with them, his siblings enjoyed teasing him. Mostly Night Light and Dwarf.
While they were spending time together, he and Y/n, he had been talking about things that he had learned while they were listening, their hands rested against their cheeks looking amused.
After a little while, he felt his cheeks flush with magic and he turned his head away "I'm... sorry. I am sure y-you um don't want to hear all of this"
"Hey, no, I do! I love hearing things you like to talk about." they scoot closer, resting their head on his lap "You can do anything you set your mind to, and I want you to believe that"
He blinks at that, his cheeks flushing with warmth and turns his head away putting his hand over his face, mumbling for them to be quiet. Oh lord, they really did know how to embarrass him well!