If aliens could confuse Earth for another planet, we could be mistaking our impressions of exoplanets Limbitech/Shutterstock
Taking a picture of a far-off world may not be enough to identify what sort of planet it is. We know this because from outside our solar system, every other planet except for Jupiter could be mistaken for Earth at some angles.
When planets beyond our solar system, called exoplanets, are discovered via directly taking an image of them, we usually only get two pieces of information from that image: the planet’s apparent brightness …
source: newscientist.com