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The slightly longer stellar period is measured as the Earth rotation angle (ERA), formerly the stellar angle. [4] An increase of 360° in the ERA is a full rotation of the Earth. A sidereal day on Earth is approximately 86164.0905 seconds (23 h 56 min 4.0905 s or 23.9344696 h).
The start and end dates of a season on any planet of the Solar System depends on same factors valid on Earth, but which have different values on different planets: North Pole direction (rotation axis direction) Vernal equinox direction; Orbit eccentricity; Year duration; Orbit plane inclination
S/1989 N 4: Neptune VI i: 18 September 1989 p: 29 September 1989 Thalassa: S/1989 N 5: Neptune IV: Terrile, Voyager 2 [37] [81] Naiad: S/1989 N 6: Neptune III 1990s Date Name Temporary designation Image Permanent designation Discoverer(s) and notes i: 22 August 1981 p: 16 July 1990 Pan* S/1981 S 13: Saturn XVIII: Showalter, Voyager 2 [37] [82 ...
The average distance between Neptune and the Sun is 4.5 billion km (about 30.1 astronomical units (AU), the mean distance from the Earth to the Sun), and it completes an orbit on average every 164.79 years, subject to a variability of around ±0.1 years. The perihelion distance is 29.81 AU, and the aphelion distance is 30.33 AU.
Made by the late Joseph Fraunhofer's firm, Merz und Mahler, it was a high-performance telescope of its era, with one of the largest achromatic doublets available and a finely made equatorial mount, with a clock drive to move the 4 m (13.4′) main tube at the same rate as Earth's rotation.
Called a "mini-moon" of sorts by some, it temporarily entered Earth's orbit on Sept. 29 from the Arjuna asteroid belt, which follows a similar orbital path around the sun as the Earth.
Now, after a decade, the series is coming back. The official Black Butler Twitter account revealed that Black Butler season 4 will start airing on April 13, 2024.
Rotation period with respect to distant stars, the sidereal rotation period (compared to Earth's mean Solar days) Synodic rotation period (mean Solar day) Apparent rotational period viewed from Earth Sun [i] 25.379995 days (Carrington rotation) 35 days (high latitude) 25 d 9 h 7 m 11.6 s 35 d ~28 days (equatorial) [2] Mercury: 58.6462 days [3 ...