Almost everyone heard of black holes, supernovas, solar flares and meteors. Everybody knows Niels Armstrong famous words. The beautiful photos were taken by the Hubble telescope travelled the whole word. But did you know that Hubble's beloved cat was named after Copernicus? Astronomers are exciting too, such as Tycho Brahe, who loses a part of his nose in a duel with another student and for the rest of his life he wore a metal inset to cover the missing part. So I picked nine astronomers. Their characteristic tools or inventions show the first letter of their names, except Hypatia, who's letter is A that means Alexandria.