We can build a telescope to see this by the way. The lens being the gravitational warping of spacetime by the sun. We go waaaay past the orbit of Pluto (I forgot the exact distance) and send probes there. We can have quite nice pictures of planets up to pretty nice distances.
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themeatbridge@lemmy.world 7 hours agoConsidering we only know it’s there because it slightly dims the light from its star as it crosses during its orbit, you would be correct. At that distance, we would never see light bouncing off the actual planet. Even the star is basically a single pixel. We can estimate its size and orbit based on how quickly it crosses in front of the star and how much the light dims, and using those two numbers we can estimate its distance from Kepler 452.
wraekscadu@vargar.org 5 hours ago
rooroo@feddit.org 2 hours ago
Easy trip to make; it took the voyagers only about 40 years to pass Pluto?
wraekscadu@vargar.org 1 hour ago
Depends on your definition of “easy”. Here’s the wiki article about it.
PancakesCantKillMe@lemmy.world 6 hours ago
I thought they could also see atmospheric composition as it passes in front of the star, no? Having that info and the data you’ve just mentioned they postulate if it’s habitable or not. Obviously not seeing any detail at all about land mass shapes, but perhaps composition? I’m not a spaceologist, so I’m only musing.
grue@lemmy.world 5 hours ago
Yeah, but it’s still just a single pixel of light from the star. It just changes color slightly when the planet passes in front of it and the atmosphere gases absorb certain characteristic wavelengths.