Hubble Space Telescope: History and Discoveries
that Changed Our View of the Universe   or   index.html


  From the dawn of humankind to a mere 400 years ago, all that
  we knew about our universe came through observations with the
  naked eye. Then Galileo turned his telescope toward the
  heavens in 1610. The world was in for an awakening.

  Saturn, we learned, had rings. Jupiter had moons. That
  nebulous patch across the center of the sky called the Milky
  Way was not a cloud but a collection of countless stars.
  Within but a few years, our notion of the natural world would
  be forever changed. A scientific and societal revolution
  quickly ensued.

  In the centuries that followed, telescopes grew in size and
  complexity and, of course, power. They were placed far from
  city lights and as far above the haze of the atmosphere as
  possible. Edwin Hubble, for whom the Hubble Telescope is
  named, used the largest telescope of his day in the 1920s at
  the Mt. Wilson Observatory near Pasadena, Calif., to discover
  galaxies beyond our own.

  Hubble, the observatory, is the first major optical telescope
  to be placed in space, the ultimate mountaintop. Above the
  distortion of the atmosphere, far far above rain clouds and
  light pollution, Hubble has an unobstructed view of the
  universe. Scientists have used Hubble to observe the most
  distant stars and galaxies as well as the planets in our solar

  Hubble's launch and deployment in April 1990 marked the most
  significant advance in astronomy since Galileo's telescope.
  Our view of the universe and our place within it has never
  been the same.

Mysteries of Deep Space: To the Edge of the Universe (30 min)

  Nearly 70 years after the astronomer Edwin Hubble discovered
  that the universe is rapidly expanding, the space telescope
  that bears his name has opened a stunning new window into deep

Some Fundamental Concepts from Test of Big Bang Cosmology

Astronomy Picture of the Day Archive