This image of the supergiant star Betelgeuse was taken by the ESO’s Very Large Telescope. Even looking through the Earth’s turbulent atmosphere, the resolution is as fine as 37 milliarcseconds. (An arcsecond is 1/3600 of a degree. A milliarcsecond is 1/1000 arcsecond.) That’s roughly the same as being able to see a tennis ball on the ground from the International Space Station.
Image Credit: ESO and P. Kervella