What phase of the Moon when it is not visible?

How do you do mission 0 on The 39 Clues? What did NASA do to ensure the astronauts would not land on the moon? Who were the first 3 men to land on the moon? Are babies born face up sometimes called stargazers? What is the visible part of the moon? How is aurora related to solar wind? What is the name of the condition for someone that requires no corrective lenses to focus on distant objects? Where are all the space shuttles located? The sun and moon? Why is Quarter moon engraved on a ring? The Columbia Space Shuttle Explosion affected the space program how? Are stars twinkling? Thyroid ultrasound? What Major events in 1957 during launch of sputnik? Can you give a sentence using the word amazement? What has a rocky surface? Is there anything beyond outer space? What creates fog? When does fog fall 5 come out? How is pressure in space suit controlled internally?