4千年紀以降
4千年紀以降(4せんねんきいこう)は、西暦の4番目以降の千年紀(ミレニアム)で、3001年以降。
“Swansong Biospheres: Refuges for life and novel microbial biospheres on terrestrial planets near the end of their habitable lifetimes”. International Journal of Astrobiology 12 (2): 99–112. arXiv:1210.5721. Bibcode: 2013IJAsB..12...99O. doi:10.1017/S147355041200047X.
↑ Jad Abumrad and Robert Krulwich (12 February 2010). Carl Sagan And Ann Druyan's Ultimate Mix Tape (Radio). National Public Radio.
1 2 Kargel, Jeffrey Stuart (2004). Mars: A Warmer, Wetter Planet. Springer. p. 509. ISBN 978-1-85233-568-7. https://books.google.com/?id=0QY0U6qJKFUC&pg=PA509&lpg=PA509&dq=mars+future+%22billion+years%22+sun 2023年11月17日閲覧。
↑ McDonough, W. F. (2004). “Compositional Model for the Earth's Core”.