1. GEOS 112L 09-08-09, 09-10-09 - Cosmology

4. from http://www.ras.org.uk/html/library/rare.html

6. from: http://astrosun.tn.cornell.edu/courses/astro201/retrograde.htm

8. http://fuse.pha.jhu.edu/wpb/n66fig1.png

9. http://virtualfieldtrip.jpl.nasa.gov/smmk/jpl/orionNebula

10. Protoplanetary Disks in Orion Nebula from: http://antwrp.gsfc.nasa.gov/apod/ap961207.html

11. Auriga Accretionary Disk from: http://antwrp.gsfc.nasa.gov/apod/ap030208.html

12. Planets forming around HR 4796A from: http://antwrp.gsfc.nasa.gov/apod/ap990205.html

13. from: http://antwrp.gsfc.nasa.gov/apod/ap990326.html

14. from: http://antwrp.gsfc.nasa.gov/apod/ap990901.html

15. from : http://antwrp.gsfc.nasa.gov/apod/image/0003/spherule_apollo11.jpg

17. Why does sun not collapse?

24. Image: NASA

28. http://www.jpl.nasa.gov/history/art/1991/asteroid_gaspra.jpg

29. Image: NASA

30. Some of Jupiter’s Moons

31. Saturn Image: NASA

34. Neptune Image: NASA

35. Recently demoted: Pluto and Charon Image: NASA