Hubble Deep Field
It is important because it shows some of the farthest away galaxies ever seen, over 3000 in total.
Because of the time it takes for light from these galaxies to reach Earth, some in the picture look exactly as they did over 10 billion (10,000,000,000) years ago. Because of this it allows scientists to look at what the Universe was like at that time, and how it changed to become what it is now. Add to this, the cosmological principle, which suggests that on large scales the Universe is roughly the same no matter what direction you look, and the HDF becomes a very important tool for astronomers studying how the Universe has changed.
For these reasons the HDF is sometimes called 'the most important image ever taken'
Related pages [change]
- "Hubble's Deepest View of the Universe Unveils Bewildering Galaxies across Billions of Years". Hubblesite.org. http://hubblesite.org/newscenter/archive/releases/1996/01/. Retrieved 06.02.10.
- "The Cosmological Principle". phyicss_uk.edu. http://csep10.phys.utk.edu/astr162/lect/cosmology/cp.html.
- "Google search:Hubble Deep Field". Google. http://www.google.co.uk/search?hl=en&safe=off&rlz=1T4RNWE_enGB313GB313&q=hubble+deep+field+most+important+image+ever+taken&meta=&aq=0&oq=hubble+deep+field+most+important.