https://en.wikipedia.org/wiki/Angular_diameter This project calculates the angular diameter of objects in arcseconds and compares them to how large other objects in the solar system appear from Earth (at best). The white line represents their width. To find the amount in arcminutes, simply divide the result by 60. For degrees, divide the result by 3600. Typically, the unaided eye can see things as small as 60 arcseconds (1 arcminute) wide. Amateur telescopes typically can go down to a little under an arcsecond at best. The limit varies a lot for professional astronomy, but it's typically around 0.05 arcseconds.
I made this primarily for people who use telescopes or are interested in astronomy, but this could also be useful for other things. = Interesting Results = 1. Chicxulub, the asteroid that killed the dinosaurs, appeared about 4 times as wide as the moon when it was as far away from Earth as the ISS orbits. The Moon was actually about 400 times larger. 2. Betelgeuse, one of the widest stars in angular diameter (which is still very small), appears about half the size of Pluto from Earth. It's actually about 500000 times wider, which is very large, even for a star. 3. The Apollo 11 Lunar Module, even including the legs, is about 10 times too small to resolve, even with the world's best telescopes.
