A lunar node is either of the two orbital nodes of the Moon, that is, the two points at which the orbit of the Moon intersects the ecliptic. The ascending (or north) node is where the Moon moves into the northern ecliptic hemisphere, while the descending (or south) node is where the Moon enters the southern ecliptic hemisphere.

4.2 Synodic Month The most familiar lunar cycle is the synodic month because it governs the well-known cycle of the Moon's phases. The Moon has no light of its own but shines by reflected sunlight. As a consequence, the geometry of its orbital position relative to the Sun and Earth determines the Moon's apparent phase.

If sun point and moon point are on one straight line through the center of the photo, the moon crescent is symmetrical and the line of symmetry is directed at the sun point.

2024年11月6日 · A half moon has one line of symmetry. This line of symmetry divides the half moon into two equal halves that are mirror images of each other. The line of symmetry runs vertically...

Only if the light ray goes through the center point of the moon in the picture through the main point H (the center point of the sensor), both ellipses have a common line of symmetry (the minor axis of the terminator and the main axis of the outline ellipse).

2017年7月3日 · The easy answer is that the moon’s orbit around Earth is tilted, by five degrees, to the plane of Earth’s orbit around the sun. As a result, from our viewpoint on Earth, the moon normally...

2022年4月28日 · no most definitely not

2022年4月28日 · Yes it does. when tilted it has the same symmetric line.

The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian. The morning terminator forms a half-circle across the Moon where the Sun is just starting to rise. As the Moon continues in its orbit, this line advances in longitude.

2018年1月25日 · In reality, the bright limb of the Moon faces the Sun, which can be north or south of due east/west relative to the Moon. Therefore, the cusps are not north/south, so the cusps can point to the "left or right" of due south on the horizon.