Jupiter is a big fella.
The largest of our solar system's planets is so big that you could toss all the planets inside it and still have room leftover for all the moons and asteroids, too. Even though it's five times farther from the Sun than we are, and therefore only gets 4% of the light we do here on Earth, it's so flippin' big that it reflects a lot of that sunlight back toward us, making it one of the brightest objects in the night sky. If you go outside after sunset tonight and look south you'll get an eyeful of that fact; it's looming over the southern horizon for northern hemisphere observers, bright and obvious (and if you do go out to look for it, the waxing gibbous Moon and bright red star Antares are nearby, too).
On June 27, 2019, Jupiter was just under 650 million kilometers from Earth. That's a long way on a human scale, but for the Hubble Space Telescope that's practically breathing down our necks. So when the space observatory was aimed at the big planet that day, this is what it saw:
Jupiter on June 27, 2019 as seen by Hubble Space ...