HR 5183 b is a big ball of gas that is floating in space. It is way too far away for people to visit or live on. Scientists think that it is a planet that goes around a star called HR 5183.
Just like how you have a toy car that goes around and around a racetrack, HR 5183 b goes around and around its star. But instead of taking just a few minutes, it takes HR 5183 b more than seven years to go all the way around just once!
It is also very big compared to our planet Earth. It is much heavier and much larger! Imagine if your teddy bear was as big as a house, that's how big HR 5183 b is.
Even though we can't go to HR 5183 b, scientists learn a lot by studying it from far away. They use big telescopes to look at it and gather information about what it's made of, how hot it is, and lots of other things. This helps us learn more about the universe and our own planet.