Summer officially comes on Friday with what is known as Summer Solstice.
At 10:42 PM EDT on June 20 (0242 GMT on June 21), the sun arrived at that point where it was farthest north of the celestial equator. To be more accurate, if solstice happens the sun Appears shining directly above a point at a point in the tropic of cancer (latitude 23.5 degree north) south of Tokyo, Japan.
From the middle of the northern latitude, we never see the sun straight over, but (as an example) as seen from Philadelphia at 1:02 PM EDT on the day of Summer SolsticeThe sun reaches the highest point in the sky for the whole year, standing 73 degrees above the southern horizon. To find out how tall height, your clenched fist held at arm height of about 10 degrees, so from the “seven brothers,” the day to go to “seven farms” over the southern horizon. And because the sun appears to describe a long arc across the sky, the duration of the day comes to the worst, lasting exactly 15 hours.
Twilight Zones
But it doesn’t mean we can stay at 9 hours left because we need to think about the hour. At the time of June Solstice at Laaluude 40 degrees North, morning and last night twenty in 2 hours, so the sky is completely dark in 5 hours.
Far north, Twilight is still last. Of 45 degrees it remained for 2.5 hours and at 50 degrees twilight continued throughout the night; The sky is never cloudy. On the contrary, the head of the south, the duration of the twilight is smaller. In the latitude 30 degrees it lasts 96 minutes while in latitude in San Juan it only works in 80 minutes. Which cause the travelers from the northern US visiting the Caribbean during this period of the year is very surprised by how quickly it is after sundown.
Often, the first sunrise and most recent sunset does not agree with summer solstice. The first occurred on June 14, while the latter did not come until June 27.
So far, it is very good
Most people may have in mind that the land is closer to the day of its orbit at this time of year, but indeed, it is just as opposed to. In fact, on July 3, at 19:55 in universal time or 3:55 pm Eastern Daylight Time, we are at that point in our orbit farther from the sun (called aphelion); a distance of 94,502,939 miles (152,087,738 km).
In contrast, it returned to January 4 that the land was in Perihelon, the closest point of the day. Distance difference between two larger measures 3,096,946,054,051 percent, making a difference in the sunny heat received on the ground at about 7 percent. Thus, for the northern hemisphere the difference with the difference in warming our winters and cool with our summers.
However, in fact, preparing large landmasses in the northern hemisphere acts in another way and overall tendencies cooler and summer hotter than southern hemisphere.
After August 6 it’s “late you”
After the Solstice’s point of view, it starts to migrate back to the south and the number of dawn in the Northern Hemisphere begins to reduce. Think of it: After Friday, the length of the day does not start increasing again for up to three days before Christmas. But indeed, if you think about it, the sun takes a long arc across the sky and the length of the day is more important than half of May. And the humility of the sun in the sky and reduces the hours of the morning in the coming days and weeks, more soon.
Ago 1 was marked with some Christian calendars as Lammas Daywhose name comes from ancient English “boaf-mass,” because it was previously observed as a festival of harvest and traditionally regarded as mid-summer. In fact, however, the middle of the summer – that moment comes exactly between Summectice Solstice and Autumnal Equinox in 2024 – will not happen until August 6:30 PM EDT. That day, too, as seen from Philly, the sun sets at 8:08 pm missing the day since June 20 only costs 56 minutes.
But in the second half of the summer the effects of the southwest shift in direct sunlights begin to be more noticeable. In fact, if officially coming in autumn in Sept. 22, the day for philadelphians will vary before seven hours of age
If he sometimes played the left field of his Hall of Fame Career with Yogies, Yogi Berra was progressing forward in Balbifield, because the shadows of the whole Balbifield reinforce for a baseball hit in his direction.
Yogi probably has not yet explained the science why the height of the day weakened during the late half of the summer, but – as it could be in a simple yogism:
“It’s been used to you there.”
Joe Rao serves as a teacher and guest lecturer in New York’s Hayden Planetarium. He wrote about astronomy for Magazine in natural history,, Sky and Telescope and other publications.
