Credits an Explanations of Photos.


FIG. 1: (Taken from NASA) This is a computer simulation of the large-scale structure of the Universe, created by a group of scientists known as the Virgo Consortium. The box "measures" 300 million light years on a side. The big bright spots are clusters of galaxies, while the smaller dots represent individual galaxies and groups of galaxies. The knot near the lower center of the picture appears to be what we believe is a good representation of the merger system Abell 754. The filamentary structure of the Universe is apparent, and we believe that mergers happen at the intersection of the filaments. In some sense the merging clusters "hit" each other at these locations. Credit: The Virgo Consortium (See NASA's page on the merger of galaxies.) Our galaxy is approximately 0.0033% of the size of this image. Our galaxy is about 100,000 light years across and contains around 100,000 million stars. A light-year is about six trillion miles, or 63,241 AUs. An AU is the average distance from the Earth to the sun, about 93 million miles.

FIG 2: This figure is also from the Virgo Consortium, from their Hubble Volume Simulations. You can find this photo and an explanation of it on this page. The fist image represents  approximately 4.6% of the width of second image. In turn, the second image represents about 1.3% of the width of the universe, based on the latest thinking.