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Astronomy - Ancient, Celestial, Observations: Astronomy was the first natural science to reach a high level of sophistication and predictive ability, which it achieved already in the second half of the 1st millennium bce. The early quantitative success of astronomy, compared with other natural sciences such as physics, chemistry, biology, and meteorology (which were also cultivated in ...
Medieval Islamic astronomy comprises the astronomical developments made in the Islamic world, particularly during the Islamic Golden Age (9th–13th centuries), and mostly written in the Arabic language. These developments mostly took place in the Middle East, Central Asia, Al-Andalus, and North Africa, and later in the Far East and India.
Also called visual brightness (V). A measure of the brightness of a celestial body as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere. The brighter the object appears, the lower its magnitude. apsis In the orbit of a planetary body, one of the two extreme points of distance between the body and its primary – either the point of minimal ...
Astronomy was the magical and scientific study of celestial objects such as stars, planets, comets, and galaxies, as well as the phenomena that occur outside the Earth 's atmosphere. [1] [2] Wizards and witches who dedicated themselves to understanding the properties and uses of these objects were called astronomers.
1906 CE. Ejnar Hertzsprung establishes the standard for measuring the true brightness of a star. He shows that there is a relationship between color and absolute magnitude for 90% of the stars in the Milky Way Galaxy. In 1913, Henry Norris Russell published a diagram that shows this relationship.
Il Portale Astronomia, fondato e gestito dal Progetto Astronomia, ha l'obiettivo di occuparsi di tutto ciò che riguarda la nostra conoscenza dello spazio e delle leggi fisiche che lo governano, ad eccezione dei temi strettamente legati all' esplorazione spaziale, di competenza del Portale Astronautica . Una voce a caso:
O Astronomy Picture of the Day ( APOD, em português: Imagem Astronômica do Dia) é um website mantido pela NASA e pela Universidade Tecnológica de Michigan. De acordo com o website, "cada dia uma imagem ou foto diferente do universo é mostrada, com uma curta explicação escrita por um astrônomo profissional". [ 1]
