How to understand moon phases: 4 tips!

Understanding moon phases can be made easier by following these four tips. First, always consider the position of the sun when observing the moon. Remember that the sun illuminates half of the moon, creating its day side and influencing the phases we see. Second, observe the moon's rising and setting patterns, noting that it always rises in the east and sets in the west due to Earth's daily spin toward the east.

This helps you understand that a crescent moon in the west after sunset is a setting moon, not a rising one. Third, remember that the moon completes one orbit around Earth each month, taking about 12 to 13 degrees of movement in the sky each day. This slow motion is distinct from Earth's daily spin and can be detected by watching the moon's position over successive days.

Lastly, be aware that the moon's orbit causes it to rise about 50 minutes later each day. This gradual shift in rising times leads to the moon appearing in different parts of the sky at nightfall, contributing to the changing phases we observe. By applying these tips, you'll gain a better understanding of moon phases and their relationship to the sun, Earth, and the moon's orbit.