While Mars today only has a wispy remnant of an atmosphere, it may once have had one hundreds of times thicker with a ...

It took her four hours to take 243 images and she then stacked those images to get a clearer picture. Known as the Pacman ...

On May 20, 1990, the Hubble Space Telescope sent its first image to Earth. This photo turned out to be 50% sharper than images from ground-based telescopes. In August of that year, Hubble made one of ...