1. 1.6 light-years: Solar System: Earth and all the planets lie close to the sun. The outer boundary of the solar system is marked by the spherical Oort cloud of comets.
2. 100,000 light-years: Milky Way Galaxy: Our galaxy contains 200–400 billion stars, most of which are dimmer than the sun. On this scale, the solar system is insignificant.
3. 5 million light-years: Local Group: The Local Group contains more than 30 galaxies, including one member larger than the Milky Way, the Andromeda Galaxy. Most galaxies are much smaller than this.
4. 120 million light-years: Local Supercluster: The Local Supercluster contains dozens of small galaxy clusters, including the Local Group. The Local Supercluster is centered on the giant Virgo Cluster, a collection of more than 2000 galaxies about 65 million light-years from the Milky Way.