This picture makes many predictions. Many of those predictions are easy to measure. And yet, flat-earthers never measure them.
10 things flat-earthers never do
A glimpse inside Hubble Space Telescope
Yes, HST is a rainbow machine.
Habitability of planets in red dwarf systems
KM dwarfs are excellent places to search for life. The minute we build starships, we should stuff a few geo-astro-biologists on board and find out more.
Fakery Detector
... sorting truth from fiction takes mental work and time. Learning will occur.
Kin to the stars.
"Spectroscopy," I might answer.
"Huh?" one might reasonably reply.
Guy Worthey 