On Saturday (September 17), the moon will enter a phase called the last quarter – also called the third quarter – during which time it will be half lit as seen from Earth.
Both the last quartile and the third quartile of the confusing names for this stage may initially be as follows the moon half lit, but it actually refers to the fact that the moon has completed 3/4 of its orbit around it a land at this point.
The half-lit moon will be visible over New York at around 11:00 PM EDT (0300 GMT on Sept. 18) and will disappear from view at dawn on Sunday (September 18) around 6:19 AM EST. (1019 GMT). At this time, the last quarter of the moon will reach a height of about 74 degrees above the horizon in the southeast (about seven fist widths at arm’s length).
During the lunar cycle, which takes about 29.5 days to complete, the moon is seen in different phases of illumination and at different times of the day.
In the last quarter, the moon rises around midnight and is at its maximum height above the horizon around dawn. It starts at midday.
During the phase of the lunar cycle that includes the last quarter, the illumination of the moon recedes as the phase of the moon changes from full moon to full moon. new Moon.
It is said that the moon is waning at this time because it changes from full moonIts most luminous state – to its least luminous phase, is called the new moon. The bright side of the Moon is shrinking because its orbit keeps it out of view from our perspective here on Earth.
The next phase in the moon’s cycle after the last quarter is the waning crescent. At this point, the Moon will be seen as little more than an arc of silvery light because it has returned roughly to the point in its orbit where it is directly facing the Sun.
This follows the new moon, at which point the luminous side of the moon is fully facing the sun which appears near invisible from here on Earth. At this point, the moon rises and sets the sun Which means he’s outside during the day. Then, the lit side of the moon grows and the moon begins to rise later each day – during which it is described as wax – and continues until it is fully lit again during the next full moon.
The separation between the light side and the dark side of the moon is called the “lunar terminator” and during the last quarter, it indicates the setting sun on the moon. On the other side of this, during the first quarter, the lunar terminator shows the rising sun on the moon.
During the first and last quarters from above the lunar axis, the lunar separator is aligned with the Earth’s separator line that divides day and night on our planet.
The next lunar cycle begins with the new moon on September 25, with the next full moon on October 9 and the next rising moon on October 17.
Be sure to check out our guides for best binoculars and the The best telescopesTo discover the last quarter moon. To capture the best pictures of the moon you can check out our guide moon photography along with our recommendations for the best astrophotography camerasAnd the Best lenses for astrophotography.
Editor’s note: If you took a photo of the last quarter moon and would like to share it with the readers of Space.com, send your photo(s), comments, name, and location to email@example.com.