Okay, so you know how there's a planet called Earth that we live on? Well, there are other planets out in space too, and one of them is called 2273 Yarilo.
It's very far away from us and we can't go and visit it, but astronomers use special tools to study it from far away. They have learned that 2273 Yarilo is a small rocky planet that's about the same size as Earth's moon.
But here's the really cool part: 2273 Yarilo spins around really fast! You know how it takes Earth a whole day to complete one spin? Well, 2273 Yarilo spins around 12 times in just 24 hours! That's really fast!
Scientists have given the planet a name that comes from ancient Slavic mythology. Yarilo was the god of the sun, fertility, and war, so it's a very powerful name for a very powerful planet. Even though we can't go there, it's amazing that we've learned so much about 2273 Yarilo just by looking at it from afar. So, that's what 2273 Yarilo is all about, a small rocky planet that spins incredibly fast and is named after a mythological god.