Far Travelers: Exploring Machines. NASA SP-480. By Books / Hardcover Nature › Space Publisher: NASA / GPO, 1987., January 1987 Price $29.95 Free Shipping Send to a friend Used - Good Good condition. No Dust Jacket (space probes) A copy that has been read but remains intact. May contain markings such as bookplates, stamps, limited notes and highlighting, or a few light stains. $29.95 1 in Stock at Warehouse Quantity Add Free Shipping to continental U.S. OR $1.00 per item discount if shipped to store.