Acta Astronautica
Warm-Up # 1 – What is celestial Navigation? Warm-Up # 2 – Who is Ptolemy? Warm-UP REVIEW.
By: Laurence, Leslee, Kassie, and Jessica Our first decision was to go to Saturn and to it’s biggest moon Titan. That alone will cost $350 million.
Bruce Banerdt for NetSAG July 29, 2009
