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What type of stuff is between us and the planet and stays on the same pixel all the time? I would assume everything in the universe moves all the time. We move. The other planet moves. How can something block the same pixel of our view of the planet all the time?


I don't think other planets usually move enough to cross one pixel. They've mostly been detected by changes in brightness of their host star. https://en.wikipedia.org/wiki/Methods_of_detecting_exoplanet...


There's also the diffraction limit: https://en.wikipedia.org/wiki/Diffraction-limited_system


> We move. The other planet moves.

Exactly. The same pixel isn't imaging the same location on the distant object. If it were, then what you say might be possible.




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