4千年紀以降
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↑ Schroder, K. P.; Connon Smith, Robert (2008). “Distant Future of the Sun and Earth Revisited”. Monthly Notices of the Royal Astronomical Society 386 (1): 155–163. arXiv:0801.4031. Bibcode: 2008MNRAS.386..155S. doi:10.1111/j.1365-2966.2008.13022.x.
↑ Murray, C.D.; Dermott, S.F. (1999). Solar System Dynamics. Cambridge University Press. p. 184. ISBN 978-0-521-57295-8. https://books.google.com/books?id=aU6vcy5L8GAC&pg=PA184#v=onepage&q&f=false
↑ Loeb, Abraham (2011). “Cosmology with Hypervelocity Stars”. Harvard University 2011: 023.