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The ancient Greeks observed that the appearance of Sirius as the morning star heralded the hot and dry summer and feared that the star caused plants to wilt, men to weaken, and women to become aroused. [30] Owing to its brightness, Sirius would have been seen to twinkle more in the unsettled weather conditions of early summer. To Greek ...
A parsec is the distance from the Sun to an astronomical object that has a parallax angle of one arcsecond (not to scale). The parsec (symbol: pc) is a unit of length used to measure the large distances to astronomical objects outside the Solar System, approximately equal to 3.26 light-years or 206,265 astronomical units (AU), i.e. 30.9 trillion kilometres (19.2 trillion miles).
The novelist Philip Pullman described the book as "a marvelous, beautiful, wise novel, which is also very funny." [4] Lucy Knight, celebrating the book's 50th anniversary in The Guardian, quotes the novelist Ali Smith's description of The Summer Book, "a masterpiece of microcosm, a perfection of the small, quiet read". [5]
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The Summer Triangle in the context of the night sky, with dimmer stars fading out first and then fading in last. From mid-to-tropical northern latitudes: the centre of the triangle appears about overhead around solar midnight during summer, and exactly so at about the 27th parallel north. This means it rises at sunset in the east and sets at ...
The average radius of the chromosphere in 1996 was about 2.2 times the optical disk (~ 10 AU) and was reported to have a temperature no higher than 5,500 K. [102] [166] However, in 2004 observations with the STIS, Hubble's high-precision spectrometer, pointed to the existence of warm chromospheric plasma at least one arcsecond away from the star.
This illustrates the fact that there are far more faint stars than bright stars: in the entire sky, there are about 500 stars brighter than apparent magnitude 4 but 15.5 million stars brighter than apparent magnitude 14. [108] The apex of the Sun's way, or the solar apex, is the direction that the Sun travels through space in the Milky Way.
The Stars and the Blackness Between Them is an American young adult fiction book by Junauda Petrus. It was released on September 17, 2019, by Dutton Books , and tells the story of two teenage girls who build a relationship, as one acclimates to life in Minneapolis after moving from Trinidad, and the other battles an illness.