1. Size and Scale of the Universe

2. Scale for the Universe 1 light-year = 1 mm

3. The Milky Way Milky Way Diameter = 100,000 light-years (on our scale) 100,000 mm = 100 m (football field)

4. M31 - Andromeda Galaxy Credit: Bill Schoening, Vanessa Harvey/REU program/NOAO/AURA/NSF Copyright Association of Universities for Research in Astronomy Inc. (AURA), all rights reserved.

5. The Local Group Distance to Andromeda Galaxy (on our scale) 2,500,000 mm = 2.5 km or 1.6 miles

6. The Virgo Cluster Credit: NOAO/AURA/NSF Copyright Association of Universities for Research in Astronomy Inc. (AURA), all rights reserved.

7. How Far to the Virgo Cluster? Distance to Virgo Cluster (on our scale) 50,000,000 mm = 50 km or 31 miles

8. The Coma Cluster Credit: NOAO/AURA/NSF Copyright Association of Universities for Research in Astronomy Inc. (AURA), all rights reserved. The Coma Berenices cluster of galaxies contains more than 1000 galaxies, with a large number of E (elliptical) and S0 (lenticular) types.

9. Keep going... Distance to Coma Cluster (on our scale) 350,000,000 mm = 350 km or 220 miles Farthest Supernova ever seen (on our scale) 10,000,000,000 mm = 10,000 km or 6000 miles London?