Changes
/* Astronomy */ source? calculation? Seems to be pure speculation!
# The planetary orbits in the solar system - including Earth's - are unstable and unsustainable over the long periods claimed by Old Earth believers.<ref>[http://www.newsweek.com/id/201582 Newsweek: "An embarrassing little secret of astronomy ...."]. (Newsweek has inexplicably taken down its article, but it is quoted by Google and other links)</ref><ref>[http://www.nature.com/nature/journal/v459/n7248/full/nature08096.html Existence of collisional trajectories of Mercury, Mars and Venus with the Earth] by J. Laskar & M. Gastineau, ''Nature'' 459, 817-819 (11 June 2009). Believers in an Old Earth speculate that the instability would not result in problems in a billion years, but other computer simulations could be developed to demonstrate multi-body instability for the solar system far more recent than that.</ref>
# At least one [[spiral galaxy]] spins in the direction opposite to the spin of its tail, suggesting an age too young to have generated the tail and contradicting the theory that the tails of spiral galaxies were formed over a long period of time.<ref>[http://www.unisci.com/stories/20021/0207023.htm "Hubble Shows Galaxy Rotating In The Wrong Direction"]</ref>
# The primary reaction in the [[Sun]] is the fusing of [[hydrogen]] to make [[helium]], but the ratio of these remains too high for the Sun to have been burning for millions of years.{{fact}}
=== Geology ===
