Which JXL supports, by the way. Tiling is mandatory for images bigger than 2048x2048, and you can construct images based on an 8x downscaled version, recursing that up to 4 times for up to 4096x downscaling.
By the "g as in graphics" logic for "gif", for "jpeg" we have "j as in joint", "p as in photographic", "e as in experts", and "g as in group", so "je-feck"?
Qalculate! has been my go-to calculator on my laptop for years, very happy to have it on my phone now too!
And it definitely knows planet radii, try `planet("earth"; "radius")`. Specifically, it knows a bunch of attributes about atoms (most importantly to me, their atomic mass) and planets (including niche things like mean surface temperature). You can see all the data here: https://qalculate.github.io/manual/qalculate-definitions-fun...