I figured what the world was lacking was a simple line drawing diagram showing the worlds of the TRAPPIST-1 system to actual scale. The worlds are to scale in both diameter and orbital radii.
Considering some additions. The main one: comparison of how big the primaries are in the skies of the secondaries. Suggestions?
Note: TRAPPIST-1 is the headlining image on Google today. It’s actually pretty cute.
Here’s what things look like from other things. On the far left is how Jupiter looks in the sky of the four Galilean moons, compared to how Luna looks from Earth and Earth looks from Luna. One the top right is how the TRAPPIST-1 star looks from its various planets. Note that even though the star is *dinky,* it is gigantic in the sky of its planets due to proximity. For all of them, the star is bigger than the moon as seen from Earth (and thus bigger than Sol in Earths sky).
At lower left is how some of the planets look from some of the other planets at closest approach. Note that virtually all closest approaches are *substantially* bigger in the sky than the moon in Earths sky, though none are as big as the Earth in Lunas sky.
Note that all three of these views are to the same scale. Jupiter from Io would be an amazing and quickly fatal sight.
Here’s just the planet-to-planet view: