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Astronomical object. An astronomical object, celestial object, stellar object or heavenly body is a naturally occurring physical entity, association, or structure that exists within the observable universe. [1] In astronomy, the terms object and body are often used interchangeably. However, an astronomical body or celestial body is a single ...
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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 ...
An aurora [a] ( pl. aurorae or auroras ), [b] also commonly known as the northern lights ( aurora borealis) or southern lights ( aurora australis ), [c] is a natural light display in Earth 's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic ).
Portaal Astronomie. Astronomie of sterrenkunde is de natuurwetenschap die zich bezighoudt met de waarneming en bestudering van alle fenomenen buiten de atmosfeer van de Aarde. [1] De sterrenkunde richt zich niet alleen op sterren en sterrenstelsels, maar ook op vele andere structuren en verschijnselen die voorkomen in het heelal, zoals planeten ...
The universe is all of space and time [a] and their contents. [10] It comprises all of existence, any fundamental interaction, physical process and physical constant, and therefore all forms of energy and matter, and the structures they form, from sub-atomic particles to entire galactic filaments. Space and time, according to the prevailing ...
Astrology. Astrology and astronomy were archaically treated together ( Latin: astrologia ), but gradually distinguished through the Late Middle Ages [1] into the Age of Reason. Developments in 17th century philosophy resulted in astrology and astronomy operating as independent pursuits by the 18th century.
