PDA

View Full Version : How Far is Earth from the Sun?



Fraser
2013-Oct-28, 05:10 PM
Itís amazing to think that for the majority of human history, we had almost no understanding about the Sun.*We didnít know what it was made of, how it formed, or how it produced energy.*We didnít know how big it was, and we didnít know how far away it was. (...)Read the rest of How Far […]

More... (http://www.universetoday.com/14437/how-far-is-earth-from-the-sun/)