http://www.talkorigins.org/faqs/faq-age-of-earth.html
http://www-astronomy.mps.ohio-state.edu/~pogge/Ast161/Unit5/deeptime.html
http://www2.nature.nps.gov/geology/usgsnps/gtime/ageofearth.pdf
http://en.wikipedia.org/wiki/Age_of_the_Earth
http://gpc.edu/~pgore/geology/geo102/age.htm
http://pubs.usgs.gov/gip/geotime/age.html
#300: Do those links address the question of planetary alignment, or do they spout current orthodoxy from a handful of scientists who subscribe to uniformitarian principles (and beat science over the head with them), or are they the infallible scriptures of so-called "modern science?"
Thankfully those who are interested in a real education know the difference between reasonable conjecture and immutable fact.