Talk:Pillar of Prophecy/@comment-98.237.90.87-20121215051212/@comment-5225231-20121216010315

More like 5 billion. At 3 the sun expands a little but looking at the nucleosynthesis of our sun, the expansion will not happen till the very latter part of the stage.

Initial Formation 0.0 Billion years (BY) ~0.9 (radius) present day 4.6BY ~1.0 R End main seq   10BY ~1.3 R Red Giant    10-12BY (estimated to expand just beyond our orbit)

Finally the sun will contract to a White Dwarf and eventually burn out.