Practical Astronomy with your Calculator

Abstract

Practical Astronomy with your Calculator, first published in 1979, has enjoyed immense success. The author's clear and easy to follow routines enable you to solve a variety of practical and recreational problems in astronomy using a scientific calculator. Mathematical complexity is kept firmly in the background, leaving just the elements necessary for swiftly making calculations. The major topics are: time, coordinate systems, the Sun, the planetary system, binary stars, the Moon, and eclipses. In the third edition there are entirely new sections on generalised coordinate transformations, nutrition, aberration, and selenographic coordinates. The calculations for sunrise and moonrise are improved. A larger page size has increased the clarity of the presentation. This handbook is essential for anyone who needs to make astronomical calculations. It will be enjoyed by amateur astronomers and appreciated by students studying introductory astronomy. • Clear presentation • Reliable approximations • Covers orbits, transformations, and general celestial phenomena • Can be used anywhere, worldwide • Routines extensively tested by thousands of readers round the world

Contributions of artificial lighting sources on light pollution in Hong Kong measured through a night sky brightness monitoring network

“…Different normalization factors were applied to the urban and rural data such that the number of urban and rural data bars will add up to 100% separately. and phase which were calculated by the formulations in Duffett-Smith (1981). Roughly half of data were collected when the Moon was above the horizon.…”

Search for Lorentz invariance andCPTviolation with muon antineutrinos in the MINOS Near Detector

“…To generate this histogram, we converted the time of the extraction magnet signal that initiates each spill, as recorded by a GPS unit, into LST in standard ways [12]. The GPS time is accurate to 200 ns [13] and event times were not corrected for the time within the 10 µs spill.…”

Prayer Times Modeling with GIS: A Case Study for Iran and Its Surrounding

“…6 is dependent on atmosphere temperature and pressure [29] , in this study the elevation of the area is equal to elevation of sea level which is zero. As it is obvious in the above map, Fajr Prayer time is computed for each point of the studying area, the contour lines are extracted with minute interval.…”

“…where, LAT is Local apparent time (Zuhr time), EOT is Equation of time (h) and ∆l is Correction due to reference longitude For local noon time, LMT is 12 in universe time [28][29][30] . So:…”

“…Time of sunrise and sunset: Rise and set are defined as the moments when the upper limb of a body is on the visible horizon [13,29,31,32] . The time of rise and set is related to refraction, horizontal parallax, DIP and semi diameter.…”