... Credit: STS-82 Crew , HST , NASA Explanation: Why put observatories in space? Most telescopes are on the ground. On the ground, you can deploy a heavier telescope and upgrade it more easily. The trouble is that Earth-bound telescopes must look through the Earth's atmosphere . ... By orbiting above the Earth's atmosphere, the Hubble can get clearer images. ... Publications with keywords: Hubble space telescope . Publications with words: Hubble space telescope . ...