First Quarter Moon is the 2nd primary Moon phase when the Moon has reached the 1st quarter of its orbit around Earth, hence the name. The 1st primary Moon phase is New Moon, while the 3rd is Full Moon, and the last is called Third Quarter Moon. Technically, the primary Moon phases occur at a specific moment in time.
In fact, the same side of the moon always faces the planet, but part of it is in shadow. And, in reality most of the time the "full moon" is never perfectly full. Only when the moon, Earth and the sun are perfectly aligned is the moon 100 percent full, and that alignment produces a lunar eclipse.
New Moon in Different Cultures. About a day after the New Moon conjunction, the Moon becomes visible again as a Waxing Crescent Moon. The initial period, as only the thinnest sliver of a Crescent Moon becomes visible, used to be called New Moon while the darkest phase was called Dark Moon.
Full Moon vs New Moon Differentiating a full moon from a new moon is so easy that even early childhood kids can already tell which is which. But aside from the blatantly obvious difference of the full moon having the brightest light and the new moon having the least light of all lunar phases, there are still several
Moon Quiz: Test Your Lunar Smarts; Full moons in 2018. Many cultures have given distinct names to each recurring full moon. The names were applied to the entire month in which each occurred. The Farmer's Almanac lists several names that are commonly used in the United States.
The new moon occurs when there is no reflected sunlight visible on its surface, leaving most of the moon's disk in darkness. During a third quarter moon, which occurs about a week before the moon is full, the majority of its surface area is visible with only a quarter remaining dark.
The waning crescent moon, sometimes called an old moon, is defined to occur when the Moon is nearly, but not precisely, on a line with the Earth and Sun. This means that part but less than one-half of the Moon is illuminated by direct sunlight, creating a crescent moon.
Waxing Gibbous Moon Dates / Next Waxing Gibbous Moon. When is the next waxing gibbous moon? A waxing gibbous moon is seen one to two weeks after a new moon. The average calendrical month, which is 1/12 of a year, is about 30.44 days, while the Moon’s phase (synodic) cycle repeats on average every 29.53 days.