The human race knows of hundreds of exoplanets, is I think using the word "know" in an absurd way. What is more accurate is that we have hundreds of PhD's, who need desperately to justify their research grants. Publish, anything will do. No one can disprove what you say that is 100's of light years away. No one has "seen" anything at those distances. Each pixel on a digital telescope recording plate, at those distances, represents an area large enough to contain many objects, except "imagined" huge ones. And the result of the status of that pixel then is a possible combination of the net result of many individual sources. To assert, therefore that a "slight" variation in "light intensity" of any individual pixel means the existence of an individual planet and no other reason, I suggest is illogical. It is well known. It is called a "boot" strap argument. I assert, without proof that " a slight variation in light" MEANS A PLANET EXIST. Therefore, if I establish I have found a slight variation in light .....I am justified in asserting I have found a planet!