4千年紀以降
Treatise on Geochemistry 2: 547–568. Bibcode: 2003TrGeo...2..547M. doi:10.1016/B0-08-043751-6/02015-6. ISBN 978-0-08-043751-4.
↑ Quirin Shlermeler (3 March 2005). “Solar wind hammers the ozone layer”. News@nature. doi:10.1038/news050228-12.
↑ Neron de Surgey, O.; Laskar, J. (1996). “On the Long Term Evolution of the Spin of the Earth”. Astronomy and Astrophysics 318: 975. Bibcode: 1997A&A...318..975N.
↑ Chyba, C. F.; Jankowski, D. G.; Nicholson, P. D. (1989). “Tidal Evolution in the Neptune-Triton System”. Astronomy and Astrophysics 219: 23. Bibcode: 1989A&A...219L..23C.
↑ Cox, J. T.; Loeb, Abraham (2007). “The Collision Between The Milky Way And Andromeda”.