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Heliographic coordinate systems are used to identify locations on the Sun's surface. The two most commonly used systems are the Stonyhurst and Carrington systems. They both define latitude as the angular distance from the solar equator, but differ in how they define longitude. In Stonyhurst coordinates, the longitude is fixed for an observer on ...
It is the complement to the solar altitude or solar elevation, which is the altitude angle or elevation angle between the sun’s rays and a horizontal plane. [4] [5] At solar noon, the zenith angle is at a minimum and is equal to latitude minus solar declination angle. This is the basis by which ancient mariners navigated the oceans. [6]
The time when the Sun transits the observer's meridian depends on the geographic longitude. To find the Sun's position for a given location at a given time, one may therefore proceed in three steps as follows: [1] [2] calculate the Sun's position in the ecliptic coordinate system, convert to the equatorial coordinate system, and
The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...
Coordinate systems in astronomy can specify an object's relative position in three-dimensional space or plot merely by its direction on a celestial sphere, if the object's distance is unknown or trivial. Spherical coordinates, projected on the celestial sphere, are analogous to the geographic coordinate system used on the surface of Earth.
Holmes Peak, north of the city, is the tallest point in the Tulsa Metro area at 1,360 ft (415 m) [42] According to the United States Census Bureau, the city has a total area of 186.8 square miles (484 km 2), of which 182.6 square miles (473 km 2) is land and 4.2 square miles (11 km 2) (2.24%) is water.
The city is 108 miles (174 km) southeast of Phoenix and 60 mi (100 km) north of the United States–Mexico border. [ 8 ] Major incorporated suburbs of Tucson include Oro Valley and Marana northwest of the city, Sahuarita [ 11 ] south of the city, and South Tucson in an enclave south of downtown.
By 1920, the towns population had increased to around 2000. A road to Tulsa was paved in the early 1920s, and with good roads leading out in all directions, Skiatook became known as the "Gateway to all points North, South, East and West". In the 1930s, Skiatook began purchasing water from Lake Spavinaw. [9]