This is 11 moon day in lunar calendar. The moon phase is a Waxing Gibbous. The second phase of the moon - a gap between the first quarter of the moon and the full moon. During this period, continued strong growth in the moon. For the second phase is typical even more significant rise in energy and internal forces, strongly expressed activity. In the Northern Hemisphere, the right side will be illuminated, and in the Southern hemisphere it'll be the left side that is illuminated.
The Waxing Gibbous phase, like all moon phases, will last for just over 7 days. The actual length will vary because of the elliptical shaped orbit of the moon. During this Waxing Gibbous phase the moon will rise in the east in the mid- to late-afternoon and will be high in the eastern sky at sunset. Assuming it's a clear night, the Waxing Gibbous moon will then be visible through most of the night before setting just before sunrise. This is related to the fact that the Moon travels faster in its orbit at perigee and slowest in its orbit at apogee.
The longest lunations result when the new Moon coincides with apogee and Earth is at perihelion. The shortest lunations result when the new Moon coincides with perigee and Earth is at aphelion. One of the shortest lunations was 29 days, 6 hours, and 35 minutes, whereas one of the longest was 29 days, 19 hours, 55 minutes.
Note: The synodic month describes the time for the Moon to complete one orbit around Earth and return to the same position relative to the Sun and Earth. If Earth were not moving along in its orbit but instead were standing still, the Moon would take less time to reach that same position: This is called the sidereal month , which is about 2. Looking at the calendar on this page, you can see that from new to full, the percentage increases, indicating the waxing stages, and from full to new, the percentage decreases, indicating the waning stages.
The New Moon is 0 percent illuminated or totally dark ; First Quarter is essentially 50 percent illuminated half of the disk is lit ; Full Moon is percent illuminated the entire disk is lit ; and Last Quarter is back to essentially 50 percent illuminated half of the disk is lit. The Moon is exactly half-lit when it reaches dichotomy , which occurs several minutes before first quarter and several minutes after last quarter. Below are general guidelines as to where to look for the Moon during each of its phases.
Times mentioned are solar time, not clock time. The four primary phases in italics rise and set at a point in time; the four secondary phases occur over a broader timespan. It occurs when light travels from the Sun to Earth, reflects off the Earth, travels to the Moon, and then bounces back to Earth to reach our eyes.
Earthshine is most noticeable within five days of a new Moon during the waning and waxing crescent stages. Both are about In other words, the Moon rotates enough each day to compensate for the angle it sweeps out in its orbit around Earth. Gravitational forces between Earth and the Moon drain the pair of their rotational energy.
We see the effect of the Moon in the ocean tides. Likewise, Earth's gravity creates a detectable bulge -- a foot land tide -- on the Moon. Eons from now, the same sides of Earth and Moon may forever face each other, as if dancing hand in hand, though the Sun may balloon into a red giant, destroying Earth and the Moon, before this happens.
There is no real formula for determining the visibility of the young Moon. It depends on several factors: the angle of the ecliptic the Moon's path across the sky with respect to the horizon, the clarity of the sky how much dust and pollution gunks it up , and even the keenness of the observer's eyesight. The young Moon becomes visible to the unaided eye much earlier at times when the ecliptic is perpendicular to the horizon, and the Moon pops straight up into the sky.
In these cases, it may be possible to see the Moon as little as 24 hours after it was new, although every hour beyond that greatly increases the chances of spotting it. When the ecliptic is at a low angle to the horizon, and the Moon moves almost parallel to the horizon as it rises, the Moon probably doesn't become visible until at least 36 hours past new.
The record for the earliest claimed sighting of the young crescent Moon is around 19 hours, although most experts are suspicious of any claims of times less than about 24 hours.
0コメント