The internet sources of many of the figures in the text are listed below. If you plan to download them, be sure to understand any copyright restrictions. Many of them make use of Creative Commons licenses while some use the GNU General Public License. Figures that are not posted on the internet and where permissions allow, are contained in the slide set.
- Fig 2.1 (chapter opening): https://pxhere.com/en/photo/989387
- Fig 2.2: https://www.nps.gov/grte/learn/news/news-release-14-59.htm
- Fig 2.3: Adapted from Stellarium Astronomy Software (GNU General Public License)
- Fig 2.4 (Left): https://commons.wikimedia.org/wiki/File:Arch_rock_startrail.jpg
- Fig 2.4 (Right): https://commons.wikimedia.org/wiki/File:Turret_Arch_with_Star_Trails_(8405369443).jpg
- Fig 2.5: Adapted from Stellarium Astronomy Software (GNU General Public License)
- Fig 2.6: See PowerPoint slide set
- Fig 2.7: See PowerPoint slide set
- Fig 2.8: https://www.boarsart.com/a-single-photograph-by-regina-valkenborgh-captures-8-years-worth-of-sun-trails/
- Fig 2.9: See PowerPoint slide set
- Fig 2.10: Based on images at https://svs.gsfc.nasa.gov/4404
- Fig 2.11 (Left): https://commons.wikimedia.org/wiki/File:Lunar_eclipse_September_27_2015_greatest_Alfredo_Garcia_Jr.jpg
- Fig 2.11 (Right): https://www.flickr.com/photos/gsfc/35909952653/in/album-72157684634696291
- Fig 2.12: Adapted from Stellarium Astronomy Software (GNU General Public License)
- Fig 2.13: https://commons.wikimedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07-edited.jpg
- Fig 2.14 (Left): https://www.nasa.gov/topics/solarsystem/features/watchtheskies/perseid-meteor-shower-aug11-12.html
- Fig 2.14 (Center): https://en.wikipedia.org/wiki/Chelyabinsk_meteor
- Fig 2.14 (Right): https://commons.wikimedia.org/wiki/File:Meteorcrater.jpg
- Fig 2.15 (Left): http://www.eso.org/public/images/carina-stockebrand
- Fig 2.15 (Center and Right): http://www.eso.org/public/images/eso0708b
- Fig 2.16: https://www.researchgate.net/figure/Chief-Pawhukatawa-of-the-Skidi-Pawnee-Bureau-of-American-Ethnology-Washington-Hyde_fig1_248725288
- Fig 2.17: https://pin.it/XeAMz7a
- Fig 2.18: https://www.fieldmuseum.org
- Fig 2.19: Not available online
- Fig 2.20: http://www.archives.gov
- Fig 2.21: See PowerPoint slide set
- Fig 2.22: https://commons.wikimedia.org/wiki/File:Chaco_Canyon_Chetro_Ketl_great_kiva_plaza_NPS.jpg
- Fig 2.23: https://commons.wikimedia.org/wiki/File:Anasazi_Supernova_Petrographs.jpg
- Fig 2.24 (Left): http://www.nps.gov/common/uploads/photogallery/imr/park/chcu/9CC16120-155D-451F-679826B51D54595C/9CC16120-155D-451F-679826B51D54595C.jpg
- Fig 2.24 (Right): http://dermuehle.blogspot.com/p/sundagger-in-chaco-canyon.html
- Fig 2.25: http://commons.wikimedia.org/wiki/File:Fajadadiagram.JPG
- Fig 2.26: http://commons.wikimedia.org/wiki/File:San_Lorenzo_Monument_3.jpg
- Fig 2.27: https://commons.wikimedia.org/wiki/File:Dresden_codex,_page_2.jpg
- Fig 2.28: https://commons.wikimedia.org/wiki/File:Mayan_Zodiac_Circle.jpg
- Fig 2.29: See PowerPoint slide set
- Fig 2.30: http://commons.wikimedia.org/wiki/File:Teotihuacan_Feathered_Serpent_(Jami_Dwyer).jpg
- Fig 2.31: https://en.wikipedia.org/wiki/File:SSA41434.JPG
- Fig 2.32 (Left and Right): Not available online (see PowerPoint slide set)
- Fig 2.33: https://commons.wikimedia.org/wiki/File:Stonehenge2007_07_30.jpg
- Fig 2.34: https://commons.wikimedia.org/wiki/File:Stonehenge_Heel_Stone_-_panoramio_(2).jpg
- Fig 2.35: https://commons.wikimedia.org/wiki/File:Stonehenge_plan_v2_notex_2.svg
- Fig 2.36 (Left): https://commons.wikimedia.org/wiki/File:Great_Pyramid_of_Giza,_Giza,_Egypt8.jpg
- Fig 2.36 (Right): See PowerPoint slide set
- Fig 2.37: https://commons.wikimedia.org/wiki/File:Bas_relief_d%27Osiris_Ounnefer_et_Isis_dans_le_naos.JPG
- Fig 2.38: https://commons.wikimedia.org/wiki/File:Vm-4359-Beijing-Observatory-Guo-Shouking-statue.jpg