It's not a single storm, but a persistent anticyclonic storm (a storm that rotates in the opposite direction of the Earth's rotation).

Here's some more about it:

* Size: It's so large that it could easily fit 2 to 3 Earths within it.

* Age: It's been observed for at least 400 years and possibly much longer.

* Color: The red color is thought to be caused by complex chemical reactions in the storm's clouds.

* Speed: The winds in the storm are incredibly fast, reaching speeds up to 400 miles per hour.

Let me know if you'd like to know more about Jupiter's Great Red Spot!