It looks like you're referring to the phases of the Moon. The phases of the Moon can be divided into two main categories based on how they appear from Earth:
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Waxing Phases: This is when the visible portion of the Moon is getting larger. The phases in this category include:
- New Moon: The Moon is between the Earth and the Sun, and is not visible.
- Waxing Crescent: A small sliver of the Moon begins to show.
- First Quarter: Half of the Moon is illuminated.
- Waxing Gibbous: More than half of the Moon is illuminated.
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Waning Phases: This is when the visible portion of the Moon is getting smaller. The phases in this category include:
- Full Moon: The entire face of the Moon is illuminated.
- Waning Gibbous: The Moon starts to decrease in size but is still more than half illuminated.
- Last Quarter: Half of the Moon is illuminated, but the opposite side from the First Quarter.
- Waning Crescent: A small sliver of the Moon remains visible before it returns to the New Moon phase.
Do you need more information on any specific phase?