Sadler effect

Have you ever been on a merry-go-round and felt like you were getting all dizzy? Well, just like that, the Earth is spinning around, too. But instead of getting dizzy, it affects something scientists call the Sadler Effect.

The Sadler Effect happens because the Earth is kind of like a big basketball made of rock and metal. This basketball isn't perfectly round because it's squished at the top and bottom. This is because the Earth is spinning around and around really fast, but it's not spinning in a straight line. Imagine spinning a basketball around but with a little wobble. That's what the Earth is doing.

Now, imagine there's a certain star in the sky that's very far away from us, but we like to look at it because it's very bright. It's like the most shiny and sparkly star in the whole sky!

But remember how the earth is wobbling as it spins? That wobbling makes the star look like it's moving around a tiny bit too, even though it's really far away. This is called the Sadler Effect! Scientists have to measure this wobbling in order to study stars and learn more about them.

So just like how getting dizzy on a merry-go-round can make you see the world in a different way, the Sadler Effect helps scientists see and understand stars in a different way.