Jurij Vega was a man who lived a long time ago, in a country called Slovenia. He was really smart and learned a lot about math and science. In fact, he was so good at math that he even made up some new math rules!
One of the things Vega was really famous for was his work on something called logarithms. These are a way of figuring out really big numbers by breaking them down into smaller, easier-to-understand parts. Vega was so good at logarithms that he once solved a really hard math problem in just a few minutes, when other people had been working on it for months!
Another thing that Vega did that was really cool was inventing a new tool called a telescope. This is a big tube with some lenses, or special pieces of glass, inside that let you see things really far away. Vega used his telescope to look at the stars and planets in the sky, and he even wrote some books about what he saw up there.
Overall, Jurij Vega was a really smart man who did a lot of great things in math and science. Even though he lived a long time ago, people still remember him today and think he was a pretty cool guy.