Hubble's orbit outside the distortion of Earth's atmosphere allows it to take extremely sharp images with almost no background light. Hubble's Ultra-Deep Field image, for instance, is the most detailed visible-light image ever made of the universe's most distant objects. Many Hubble observations have led to breakthroughs in astrophysics, such as accurately determining the rate of expansion of the universe."
Let's get right to those amazingly sexy glimpses of our universe through the eye of the Hubble -
(A dying star -- above)
(Nebula - above)
(Two galaxies collide!)