why is the moon sometimes visible during the day

Any clear morning this week around 10 a. m. you can see the moon riding high in the western sky. Many people are surprised to see the moon in full daylight, yet it is a completely normal occurrence. A very common misconception in astronomy is that the moon is directly opposite the sun in the sky. In fact, the moon is only in this position for a single instant in the whole lunar month: the exact time of, when it is 180 degrees away from the sun. The rest of the month it can be anywhere from 0 to180 degrees away and, at least in theory, visible in the daytime sky. At full moon, the moon is exactly opposite the sun. This means that the moon rises just as the sun is setting, and sets just as the sun is rising. This is also the only night in the month when a lunar eclipse can happen. Even so, eclipses normally happen only one full moon out of every six; the other times the Earth's shadow is either too high or too low to touch the moon. Two things contribute to the moon being visible in daylight. First, it is bright enough that its light penetrates the
of the sky. If you're looking at exactly the right spot with a telescope, you can also see the planets Mercury, Venus, and Jupiter in daylight, plus a few of the brightest stars (though few casual observers can actually pull this off). Secondly, the moon must be high enough in the sky to be visible. Because of the Earth's rotation, the moon is above the horizon roughly 12 hours out of every 24.


Since those 12 hours almost never coincide with the roughly 12 hours of daylight in every 24 hours, the possible window for observing the moon in daylight averages about 6 hours a day. The moon is visible in daylight nearly every day, the exceptions being close to new moon, when the moon is too close to the sun to be visible, and close to full moon when it is only visible at night. The best times in the month to see the moon in daylight are close to first and last quarter, when the moon is 90 degrees away from the sun in the sky. That's the situation this week. Last quarter is on Saturday, Sept. 12. If we set to that date, and its location to New York, we see that the moon rises at 11:06 p. m. the night before. The sun rises at 6:34 a. m. , at which time the moon is 74 degrees above the horizon, almost overhead. Sun and moon will both be above the horizon until the moon sets at 3:03 p. m. , although the moon will be hard to see for the last hour or so because of horizon haze. Similarly, the moon will be well placed for daytime observation near first quarter, which next falls on Saturday, Sept. 26. The difference here is that the sun will be leading the moon, setting at 6:46 p. m. , followed by moonset at 12:06 a. m. Once you've seen the daylight moon on these easy dates, it's worth trying to see how many days in the month you can manage to spot it. This article was provided to SPACE. com by, the leader in space science curriculum solutions.


In 2011, NBC published a on how employees could "read the riot act" to their subordinates. Professional footballer Stцphane Mahц was once "read the riot act" after a rival player so hard he needed four stitches. In Bibb County, Georgia, a Superior Court Judge "read the riot act" to a of wayward teens in an effort to curb their bad behavior. The idiom, which has been in use for centuries, is generally thought to mean the admonishment of a person or persons who have committed an error in judgment. But the origin of the term "riot act" concerns a very particular wrongdoingБan unlawful public assembly that peace officers of the 16thб century fought with a pre-written warning to disperse or face serious repercussions. Like death. reports that the riot act was first passed by British Parliament in 1714 and took effect on August 1, 1715. At its core, the Act served as what linguists refer to as a speech act: a word, phrase, or order that carries real weight. (Think of an ordained minister pronouncing a couple husband and wife. ) If confronted with a rowdy crowd, an authoritarian would arrive andБthis was crucialБ read the Act aloud in order to serve formal notice that the parties involved were overstepping their bounds. The Act was passed in haste because supporters of the Catholic Jacobite political movement had been their disapproval of King George I. A "riot" was any group of 12 or more people that was engaged in public disharmony.


Typically, the raucous formation would be given 60 minutes to take a hike. If not, their just punishment would be prison, labor, or death. If the peace officer believed danger was imminent, he wouldn't have to wait the whole hour: He could deputize citizens to try and break up the gathering. To enforce the Act and any punishments, the officer had to the reading by shouting, "God save the King! " Scholars have wondered how successful such orators were in scolding a large assembly of angry protestors. In 1768, the answer was: not very. People opposing the imprisonment of radical John Wilkes ignored the Riot Act and suffered shots of musket ball, which killed seven. The Riot Act was officially repealed in England and Wales in 1967 as part of some legislative housekeeping. Today, it's almost always used as a figure of speech, although Belize still it as a meaningful method of crowd dispersal. In 2017, police officers drew criticism for launching tear gas into a People's United Party protest without first reading them the Riot Act. Questioned by a reporter, assistant commissioner of police Edward Broaster said that the incident didn't "meet the threshold" for busting out the paperwork. Have you got a Big Question you'd like us to answer? If so, let us know by emailing us at.

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