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Summer solstice, the longest day of the year - VIDEO

2021-06-26T07:13:22.179Z


The appointment with the hottest season is at 5.32 on Monday 21 June (ANSA) Summer solstice: the appointment with the hottest season and the longest day of the year is at 5.32 on Monday 21 June. In fact, the day lasts 15 hours and 14 minutes, according to the Italian Amateur Astronomers Union (Uai) because the sun rises at 5.37 and sets at 20.51. “Those who live in the Northern hemisphere will be able to see the Sun reach the northernmost position in its apparent movemen


Summer solstice: the appointment with the hottest season and the longest day of the year is at 5.32 on Monday 21 June.

In fact, the day lasts 15 hours and 14 minutes, according to the Italian Amateur Astronomers Union (Uai) because the sun rises at 5.37 and sets at 20.51.

“Those who live in the Northern hemisphere will be able to see the Sun reach the northernmost position in its apparent movement in the sky, in which it will appear to stop longer,” observes astrophysicist Gianluca Masi, head of the Virtual Telescope.

“The etymology of the term 'solstice' itself - observes Masi - underlines a sort of prolonged pause, after which the Sun will resume its apparent path, until the winter solstice”.

The word 'solstice' derives from the Latin 'solstitium', from 'sol' (Sun) and 'stitium' (still).


The area of ​​central Europe on the day of the summer solstice (source: Eh101 from Wikipedia)

The solstice occurs when the Sun, in its apparent motion along the constellations of the Zodiac, is further north than the celestial equator: a position that guarantees its maximum stay above the horizon and explains why the day of the solstice of summer is the longest of the year, meaning that the period of light has the greatest duration.





In the video, the transit of the solar disk on the sundial of the Basilica of Santa Maria degli Angeli e dei Martiri, in Rome, on the occasion of the Summer Solstice 2020. 


Precisely because of the Solstice, the transit involves the end of the meridian line which corresponds to the figure of Cancer, which in ancient times 'hosted' the Sun in this circumstance (which today occurs instead in the constellation of Taurus due to the phenomenon of the Precession of the Equinoxes). The video is by Gianluca Masi, head of the Virtual Telescope Project.

Source: ansa

All tech articles on 2021-06-26

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