Is There a Sun in the Middle of the Earth?

A lot of people think that the u f os stemmed from hollow earth, because there have been so many stories of people seeing them coming up out of the ocean. It could be an advanced civilization that is nesting towards the earth's core and is using a advanced technology like u f to come out of these holes, float around and do things. But theyre's even like fighter pilots that have classified videos where they are tracking a little spherical object or some sort of pill shaped object. And it's just weird to track objects that seem to be going fast, that come in and out of the water. If they're not like a dolphin that ra reavs at water like crazy. That