1. Bio/EPS/Phys 210 Epic of Evolution The Universe Today

2. Bio/EPS/Phys 210 Epic of Evolution Getting a sense of scale “ Powers of 10 ” (1977) by Ray and Charles Eames Narrated by Philip Morrison http://powersof10.com/index.php?mod=watch_powersof10

3. Bio/EPS/Phys 210 Epic of Evolution KmLight years Radius of Earth6378 Earth Moon distance384,000 Earth Sun distance1.5 X 10 8 (1 a.u) Nearest star4.1 X 10 12 4.3 Center of the milky way2.5 X 10 17 26000 Nearest galaxy (Andromeda)2 X 10 6 (2 Mly) Virgo Cluster5.3 X 10 7 (53 Mly) Quasars0.8 - 10 Bly Cosmic background13 Bly Visible universe13.2 Bly 1 ly = speed of light X 1 year = (3 X 10 5 km/s) X (3.15 X 10 7 s) = 9.5 X 10 12 km Getting a sense of scale

4. Bio/EPS/Phys 210 Epic of Evolution The solar system Oops! Sorry Pluto! Footnote: over 400 exoplanets have now been detected!

5. Bio/EPS/Phys 210 Epic of Evolution Stars & the Milky Way 10 11 stars 100,000 ly across Spiral arms 10 11 stars 100,000 ly across Spiral arms

6. Bio/EPS/Phys 210 Epic of Evolution Galaxies & Clusters Andromeda M 31 Virgo Cluster Hydra Cluster

7. Bio/EPS/Phys 210 Epic of Evolution Gas & Dust

8. Bio/EPS/Phys 210 Epic of Evolution Gas & Dust

9. Bio/EPS/Phys 210 Epic of Evolution ExoticaExotica Supernovae Neutron stars Pulsars Black Holes

10. Bio/EPS/Phys 210 Epic of Evolution ExoticaExotica Colliding galaxies Supermassive black holes 3 billion solar masses 4 million solar masses A SMBH in the Milky Way

11. Bio/EPS/Phys 210 Epic of Evolution ExoticaExotica Quasars

12. Isotropy of the universe SystemDistanceStructure Solar system10 9 kmOrbits Galaxy26 klySpiral arms, core Local group3 Mly17 galaxies Virgo cluster65 Mly>2000 galaxies Local supercluster300 Mly100 clusters Distant clusters3 BlyIsotropic Quasars10 BlyIsotropic CMB13 BlyIsotropic to 10 -5 Bio/EPS/Phys 210 Epic of Evolution

13. Measuring distance in astronomy 1 arcsecond 1 a.u 1 parsec 1 parsec = 3.26 ly Parallax Bio/EPS/Phys 210 Epic of Evolution