Earth and Sun and Moon
I've been meaning to write a post about the sun, greenhouse gases and global warming, however, I've come across a webpage by Tom Rees
, which covers the topic a whole lot better than what I could ever do.
In a nutshell, basically, changes in the sun correlate reasonable well with changes in the earths temperature. However, this relationship starts to fall apart in the 1970's, as the earth suddenly starts to warm. No change in a solar indicator (sun spots etc) is consistent with this warming. Likewise for signals such as high energy cosmic rays, and fluctuations in the earths magnetic field.
The likely significant causes of climate change in the last century are greenhouse gases, solar variability, volcanos, and small particles in the atmosphere.