The pioneer astronauts who took America into space tell their personal stories about the challenges they faced -- their fears, joys, friendships, and successes.

Chosen from hundreds of crackerjack pilots for their fitness, intelligence, and courage, the original Mercury Seven astronauts risked their lives to cross the space frontier. In "We Seven, " they take readers behind the scenes to show them their training, technology, and teamwork, and to share personal stories, including the lighter moments of their mission. They bring readers inside the Mercury program -- even into the space capsules themselves. "We Seven" straps you in with the astronauts and rockets you along for the ride.

Share Alan Shepard's exhilaration as he breaks through the earth's atmosphere. Endure moments of panic with Gus Grissom when his hatch blows, stranding him in the open sea. Race with John Glenn as he makes split-second life-or-death maneuvers during reentry, and feel his relief when he emerges safe but drenched with sweat.

Despite such heroism, Project Mercury was more than the story of individual missions. It defined the manned space flight program to come, from Gemini through Apollo. In "We Seven, " America's original astronauts tell us firsthand -- as only they can -- about the space program they pioneered, and share with us the hopes and dreams of the U.S. at the dawn of a new era.

Optics of the Moon presents methods for interpreting optics of surfaces on the Moon with complicated structures. For example, the book illustrates how phase-ratio techniques can lead to the detection of surface structure anomalies, describes polarimetric studies of the lunar surface and their use, and addresses many other questions relating to the regolith-like surfaces of the Moon, such as why the Moon looks like a ball at a large phase angle and like a disk in full moon, why the lunar surface has slight color variations, and why at large phase angles its polarization degree closely correlates with albedo.

Exam Board: Edexcel Level: A level Subject: Physics First teaching: September 2015 First exams: June 2017 Revise smart and save! Our Revision Workbooks are designed to help students develop vital skills throughout the course in preparation for the exam with: One-to-one page match with the Edexcel AS/A level Physics Revision Guide so you can find the practice you need quickly and easily Skills building pages and practice questions in the style of the new exams Guided support and hints providing additional scaffolding, helping you avoid common pitfalls Full set of practice papers written to match the new specification exactly