Winner of the 2009 American Institute of Aeronautics and Astronautics (AIAA) Children's Literature Award. How do we know that Mars is covered in rusty dust, that a day on Venus lasts longer than its... This description may be from another edition of this product.
ThriftBooks sells millions of used books at the lowest everyday prices. We personally assess every book's quality and offer rare, out-of-print treasures. We deliver the joy of reading in recyclable packaging with free standard shipping on US orders over $20. ThriftBooks.com. Read more. Spend less.