The Sun is never directly overhead in the Continental US. The Sun's maximum inclination is 23.26 degrees, at the Summer Solstice, but Key West, the southern most point of the Continental US, is 24.5 degrees. It is close, but it is not directly overhead.
None. This phenomenon can only occur in the 'tropics', between 23.5 degrees south latitude and 23.5 degrees north.
Hawaii qualifies as being inside this band ... by about 2 degrees. But the continental US doesn't.
Key West FL is out by 1 degree, and Brownsville TX by 2-1/2 degrees.
None. The Sun never goes further North than 23.5 degrees.
That event occurs at two instants during the year ... one in March and one in September,
when the sun passes through the equinoxes.
That happens twice a year at any latitude between 23.5° south and 23.5° north.
At the equinoxes - around 21 May, and 23 September.
They are the Spring and Autumnal equinoces.
21 March and 21 December.
It shines directly overhead at noon on June 21-22, usually 1 or 2 days.
They are both imaginary lines of latitude in the Northern Hemisphere. Their degree measurements are roughly complementary (add to 90°) What is significant about the Tropic of Cancer? (23.4378° N) It sees 90-degree sun rays (directly overhead at noon on the equinoxes), including the northernmost points where this is possible. What is significant about the Arctic Circle? (66.5622° N) It includes the southernmost polar locations that can have one day of 24 hour sunlight, and one day of 24 hour night. Points closer to the North Pole will receive more days of all sun or all night, becoming six months of day and night at the Pole.
The Tropic of Capricorn is the farthest south on the earth where the sun can be directly overhead at any time.Technically, that only happens at a single moment, at some time on December 21 or 22.
AS THE EARTH spins on its axis, the sun is virtually directly overhead at all places along the Tropic of Capricorn, in the Southern Hemisphere at noon on December 21, 2009. This is at latitude 23.44o South.HOWEVER, the sun's overhead position about 91 days earlier was directly over the equator. And it has been gradually moved southwards. But by December the 10th the sun will only have reached latitude 22.95oSouth.So all we have to do is look at a map and see what is situated at latitude 22.95o South.Thohoyandou, South Africa, is located at latitude 22.95 degrees South. Therefore, at the solar time of 12 noon the sun will be directly overhead there. And, as the earth spins, the entire circle of the earth at that latitude will experience overhead sun at noon (solar time) on that day, December 10th.SHALL WE GO around the earth, chasing the mid-day sun at latitude 22.95o South, on December 10th?We'll start in Rio de Janeiro, Brazil. The sun will be directly overhead there at mid-day. But, to keep the sun overhead we must move west with the sun to San Paulo, then we quickly follow the sun due west toParaguayArgentinaChilethen we are in (or over!) the Pacific Ocean, before we reachAustralia, arriving in Queensland, going right across Australia and leaving from Western Australia. Next we cross theIndian Ocean toFarafangana, Madagascar. Another landmark in our journey, still travelling due west, could well beBanhine National Park, Mozambique, thenBotswana, thenWindhoek, Namibia. Next is theSouth Atlantic Ocean. We go right across that ocean and land atRio, arriving exactly 24 hours after we started! And it has been midday for the entire journey! Did you keep awake?NOTE: The sun has been inching slowly southwards during our 24 hour trip so now it will be just a bit further south in the sky than it was when we first saw it in Rio the day before. It is slowly inching towards its southernmost destination, at latitude 23.44o South, and will arrive there on December 21st.BUT WHERE is Thohoyandou in this round-the-world trip? We haven't shown it in the list above. But if you look on a map, you'll see where it should come in our list of places that all experience overhead sun at noon on December 10th, 2009.
High tide on most days occurs twice per day. Once when the moon is directly overhead, and then when the moon is on the opposite side of the world.
There are only two days of the year is when the sun directly overhead Singapore. This is as a result of being almost at the same latitude as the equator.
Never. The Sun can only be directly overhead (90 deg altitude) at latitudes between 23.5 deg N and 23.5 deg S. The Sun is directly overhead at a latitude of 23.5 deg N on the summer solstice. On that day it would be at its highest point in the sky for an observer at 27.947 deg N (about 85.553 deg above S horizon), but it would not be directly overhead.
It shines directly overhead at noon on June 21-22, usually 1 or 2 days.
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The specifics change depending on the latitude in question, but the noontime shadow will become shorter as the sun's direct rays of incidence approach the latitude in question and longer as the sun's direct rays of incidence recede from that latitude. For example, if you live at 45 degrees North, your shortest shadow will be on the summer solstice, since the sun's direct rays of incidence are at 23.5 degrees North on that day and will be south of that position on all other days. Conversely, if you live at the equator, your shortest shadows will be on the vernal and autumnal equinoxes, since the sun is directly overhead on those days.
On the first day of Northern Hemisphere Summer, the sun is directly overhead at some point on the Tropic of Cancer ... the line around the Earth that's about 23.5° north of the equator. At every other latitude between the equator and the Tropic of Cancer ... all in the northern hemisphere ... the sun is directly overhead twice, on two different days between March 21 and September 21, with June 21 exactly between them. How far the two days are on either side of June 21 depends on the latitude. Right ON the equator, they're March 21 and September 21.
To be directly overhead the moon must be at the correct latitude. For some locations this is simply not possible because the moon's orbit is nearly in the plane of the equator. For other locations, it is necessary to know the latitude of your location.
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The solstices.
Yes. Most places in the Hawaiian Islands will experience the noon Sun "straight overhead" twice each year. In fact, the phrase "Lahaina Noon" is sometimes used in the Islands to refer to those days on which the Sun reaches the zenith.
Mali is in the Tropics.The Tropics of the Northern Hemisphere lie between the equator--0° latitude--and the Tropic of Cancer--23½° north latitude. Mali is a tropical country, which suggests that it is hot. Why is it so hot?Because the sun's rays are more directly overhead, thus very intense over much of the year.Because there is little cloud cover most of the year.The sun passes directly overhead on two days each year.Source: http://mali.pwnet.org/geography/geography_location.htmThe Mosque of djenne is in Djenne, Mali. So the mosque is in the Northern Hemisphere.