Learn how the Moon’s phases form, why it changes shape in the sky each night, and what each stage — from new moon to full moon — actually means.

The Moon is getting 1½ inches (3.8 centimeters) farther away from the Earth every year. Scientists measure the distance to the Moon by bouncing lasers off mirrors placed there by space probes and ...

Learn more about how human cycles, such as sleep and the menstrual cycle, may have once been in sync with the lunar cycle. However, artificial light may now be making these cycles shorter and ...

A total lunar eclipse, also known as a blood moon, will occur Sept. 7-8. The September lunar eclipse will be the last of the year. The next lunar eclipse visible from North America will not be until ...