By Terry Allan Hicks
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Extra info for Earth and the Moon (Space!)
56 back to the moon and beyond Perhaps someday this lunar view of the rising Earth will be a normal sight for people living and working on the Moon. NASA estimates that the cost of keeping one person on the Moon would be one million dollars per minute! Many people believe that the Moon should not be used in this way. They think this precious satellite should be preserved and used only for exploration and scientiﬁc discovery. However, the pressure to use the Moon to help solve some of Earth’s problems may be too strong for humankind to resist.
Earth’s Journey through Space. New York: Chelsea House, 2007. Carson, Mary Kay. Exploring the Solar System: A History with 22 Activities. Chicago: Chicago Review Press, 2008. Elkins-Tanton, Linda. The Earth and the Moon. New York: Chelsea House Publications, 2006. Jefferis, David and Mat Irvine. Return to the Moon. New York: Crabtree Publishing, 2007. Simon, Seymour. Our Solar System. New York: Scholastic, 2005. Thimmesh, Catherine. Team Moon: How 400,000 People Landed Apollo 11 on the Moon. New York: Houghton Mifﬂin, 2006.
A CELESTIAL DANCE What truly sets Earth and the Moon apart from all the other objects in the Solar System is their complex relationship with each other, and with the Sun. Their movements through space create many of the things we take for granted—the days, the months, the years, the seasons, even the weather. Days, Years, and Seasons Earth, like all the other planets, orbits the Sun in a regular but elliptical path. 25 days—the period we deﬁne as a year—to travel once around the Sun. (Other planets take much longer.
Earth and the Moon (Space!) by Terry Allan Hicks