The Moon

The regular daily and monthly rhythms of Earth's only natural satellite, the Moon, have guided timekeepers for thousands of years. The presence of the Moon stabilizes Earth's wobble. This has led to a much more stable climate over billions of years, which may have affected the course of the development and growth of life on Earth. Much remains to be learned about our Moon. Researchers continue to study the samples and data returned by Apollo and other missions, as well as lunar meteorites.

• In March, we continue to celebrate the contributions of women throughout history with Women's History Month. Here at About Astronomy and Space, we salute the many women who have been an integral part of the history of astronomy and space exploration. Today, we highlight Eileen Collins, the first woman to pilot a space shuttle, the first woman to command the space shuttle, and commander of the return to flight mission after Columbia disaster.
  
• We've all heard the expression "Once in a Blue Moon." So, what does it mean?
  
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