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The apsides refer to the farthest (2) and nearest (3) points reached by an orbiting planetary body (2 and 3) with respect to a primary, or host, body (1). An apsis (from Ancient Greek ἁψίς (hapsís) 'arch, vault'; pl. apsides / ˈ æ p s ɪ ˌ d iː z / AP-sih-deez) [1] [2] is the farthest or nearest point in the orbit of a planetary body about its primary body.
The ancient Greek astronomer Hipparchus noted the apsidal precession of the Moon's orbit (as the revolution of the Moon's apogee with a period of approximately 8.85 years); [4] it is corrected for in the Antikythera Mechanism (circa 80 BCE) (with the supposed value of 8.88 years per full cycle, correct to within 0.34% of current measurements). [5]
Some of these TNOs with an extreme aphelion are detached objects such as 2010 GB 174, which always reside in the outermost region of the Solar System, while for other TNOs, the extreme aphelion is due to an exceptionally high eccentricity such as for 2005 VX 3, which orbits the Sun at a distance between 4.1 (closer than Jupiter) and 2200 AU (70 ...
Its aphelion, or farthest distance from the Sun, is 35 au (5.2 billion km), roughly the orbital distance of Pluto. Unlike the overwhelming majority of objects in the Solar System, Halley's orbit is retrograde; it orbits the Sun in the opposite direction to the planets, or, clockwise from above the Sun's north pole. [44]
Due to its highly eccentric orbit, the distance of Gonggong from the Sun varies greatly over the course of its orbit, from 101.2 AU (1.514 × 10 10 km; 9.41 × 10 9 mi) at aphelion, its furthest point from the Sun, to around 33.7 AU (5.04 × 10 9 km; 3.13 × 10 9 mi) at perihelion, its closest point to the Sun. [3] [1] Gonggong last reached ...
Thus, ten thousand years from now Earth's northern winter will occur at aphelion and northern summer at perihelion. The severity of seasonal change — the average temperature difference between summer and winter in location — will also change over time because the Earth's axial tilt fluctuates between 22.1 and 24.5 degrees.
An aphelion is the furthest point of an orbit around the Sun. Aphelion may also refer to: Music. Aphelion (Edenbridge album), 2003; Aphelion (Dave Rempis album), 2014;
A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby obscuring the view of the Sun from a small part of Earth, totally or partially.Such an alignment occurs approximately every six months, during the eclipse season in its new moon phase, when the Moon's orbital plane is closest to the plane of Earth's orbit. [1]