Earth weather satellites accidentally spy on Venus

> To spot Venus in the Himawari data, the team used the precise imaging schedule and position of the satellites. "Because we know almost exactly when and where Himawari is looking," Nishiyama said, "we can roughly predict where Venus will appear in each image. From there, we isolate the pixels corresponding to Venus."

I love how this trick pops up over and over. It's the same result from information theory that allows the detection of a carrier below the noise floor. If you know where and when to look you can increase the signal-to-noise ratio and, in effect, create bandwidth.