Found this in another forum: 1) Is the moon really orbiting the earth? 2) What is the effect of the Universe's expansion on the Moon/Earth or Sun/Earth distance? http://www.news.cornell.edu/stories/March06/CMB_Timeline300.jpg [Broken] From that image, there's been about 10-20% universe expansion during the last 4 billion years. Does that translate into any effect on the "small" distances in our Solar System? Thanks.