Add this copy of Understanding Our Universe to cart. $58.52, new condition, Sold by Just one more Chapter rated 5.0 out of 5 stars, ships from Miramar, FL, UNITED STATES, published 2011 by W. W. Norton & Company.
Add this copy of Understanding Our Universe to cart. $90.91, new condition, Sold by GridFreed rated 4.0 out of 5 stars, ships from North Las Vegas, NV, UNITED STATES, published 2011 by W. W. Norton & Company.
