Perhaps most promising is an upcoming project called the Next Generation Cosmic Microwave Background Experiment ... "depends on whether our computer simulations include Planet Nine." ...

But computer simulations ... quickly pick it out from the background stars.” There’s also the possibility, though remote, that a serendipitous picture of the planet already exists.

In fact, this was how Pluto was discovered in 1930, as a dot of light was seen in two different positions, in a pair of images, relative to background ... the distant planet. Computer simulations ...

For it was chosen by Microsoft engineers as the desktop image for their Windows XP background ... is probably the most recognized photo on the planet. If you took it to some village in Bangladesh ...