A series of photos taken from space more than 20 years ago revealed
thousands of unknown galaxies in a tiny patch of empty space. Called the
Hubble Deep Field, the amazing image is made up of hundreds of photos
combined into one. It was taken over the course of 10 days from the
Hubble Space Telescope and has prompted astronomers and other scientists
to speculate about universe's size, shape, and age. How long ago did the
first galaxies appear? Have they always looked like they do today, or
have their shapes evolved over time? And will they, along with the
universe itself, go on expanding forever? The Hubble Deep Field has
helped to answer some of these questions.