I've just come across a nice little site that gives an impression of the scales involved in astronomy. Its starts by showing the position of all the stars located within 12.5 light years of the Milky Way.
Progressive images increase the scale by a factor of roughly ten, until you reach the final one which shows the large scale structure of essentially the entire observable Universe. My personal favourite is the penultimate image which shows the structure located within about 1Glyr of the MW, the large superclusters of galaxies are readily apparent as are the filaments that stretch between the clusters.
There are also several nice pages which describe the Big Bang theory and General Relativity. Go check it out.
Progressive images increase the scale by a factor of roughly ten, until you reach the final one which shows the large scale structure of essentially the entire observable Universe. My personal favourite is the penultimate image which shows the structure located within about 1Glyr of the MW, the large superclusters of galaxies are readily apparent as are the filaments that stretch between the clusters.
There are also several nice pages which describe the Big Bang theory and General Relativity. Go check it out.
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