Discoveries made by the Hubble Space Telescope
http://edu-observatory.org/olli/Hubble/HST_Talk.141201.html

The Hubble Space Telescope has changed our view of star/planet
formation, the final remnants of dying stars, galactic
interactions, and cosmology. Dark Matter and Dark Energy are
huge mysteries in Astronomy.

But we have to start with Edwin Hubble
  http://edu-observatory.org/olli/tobbc/Week1.html

Tools: Spectra and Doppler Shift

What is Dark Matter?

Hubble Space Telescope's contributions to understanding Dark Matter
  http://edu-observatory.org/olli/Hubble/Week6.html

  

  Explanation: The matter in galaxy cluster 1E 0657-56, fondly
  known as the "bullet cluster", is shown in this composite
  image. A mere 3.4 billion light-years away, the bullet
  cluster's individual galaxies are seen in the optical image
  data, but their total mass adds up to far less than the mass
  of the cluster's two clouds of hot x-ray emitting gas shown
  in red. Representing even more mass than the optical
  galaxies and x-ray gas combined, the blue hues show the
  distribution of dark matter in the cluster. Otherwise
  invisible to telescopic views, the dark matter was mapped by
  observations of gravitational lensing of background
  galaxies. In a text book example of a shock front, the
  bullet-shaped cloud of gas at the right was distorted during
  the titanic collision between two galaxy clusters that
  created the larger bullet cluster itself. But the dark
  matter present has not interacted with the cluster gas
  except by gravity. The clear separation of dark matter and
  gas clouds is considered direct evidence that dark matter
  exists.

Hubble Space Telescope's contributions to understanding Dark Energy
  http://edu-observatory.org/olli/Hubble/Week7.html

Test of Big Bang Cosmology
  http://edu-observatory.org/olli/tobbc/index.html

Hubble's Greatest Hits
  http://ngm.nationalgeographic.com/2007/11/hubble/hubble-timeline-interactive
  

 
    sam.wormley@gmail.com