Search results
Results from the WOW.Com Content Network
Since Earth rotates eastward, all celestial objects outside the circumpolar circle (including the Sun, Moon, and stars) rise in the east and set in the west [2] for observers outside the polar circles. Seasonal variation means that they sometimes rise in the east-northeast or east-southeast, and sometimes set in the west-southwest or west ...
VSOP87C Heliocentric ecliptic rectangular coordinates for the equinox of the day; the most useful when converting to geocentric positions and later compute e.g. rise/set/culmination times, or the altitude and azimuth relative to your local horizon; VSOP87D Heliocentric ecliptic spherical coordinates for the equinox of the day
the background of general theory; including mathematical techniques used to analyze the Moon's motion and to generate formulae and algorithms for predicting its movements; and also quantitative formulae, algorithms, and geometrical diagrams that may be used to compute the Moon's position for a given time; often by the help of tables based on ...
A glow on the northern horizon resolved itself into the sun at 11 am that day. A quarter of an hour later the unreasonable visitor disappeared again, only to rise again at 11:40 am, set at 1 pm, rise at 1:10 pm and set lingeringly at 1:20 pm. These curious phenomena were due to refraction which amounted to 2° 37′ at 1:20 pm.
Upon popular demand, the Chapronts also published ELP2000-85 [4] and a book, Lunar Programs and Tables [5] with a truncated version of their theory and with programs, that could be used by historians and amateur astronomers to compute the position of the Moon themselves. Jean Meeus used the ELP in his popular book Astronomical Algorithms (1991 ...
The simplest algorithm for generating a representation of the Mandelbrot set is known as the "escape time" algorithm. A repeating calculation is performed for each x, y point in the plot area and based on the behavior of that calculation, a color is chosen for that pixel.
Algorithms for Computing Astronomical Phenomena; Astronomy Answers: Position of the Sun; A Simple Expression for the Equation of Time; The Equation of Time; Equation of Time; Long-Term Almanac for Sun, Moon, and Polaris V1.11; Evaluating the Effectiveness of Current Atmospheric Refraction Models in Predicting Sunrise and Sunset Times
MoonRise is a robotic mission concept to the south pole of the Moon.It was proposed in 2017 for NASA's New Frontiers program mission 4, but it was not selected. If funded and launched by another NASA opportunity, it would focus on the giant South Pole–Aitken basin (SPA basin) on the far side of the Moon between the Moon's South Pole and Aitken Crater, 16° south of the Moon's equator.