Surf these sites: (FAQ) Astronomical Calculations for the Amateur -- Calculation of astronomical events is a vast field with literature stretching back centuries, even to ancient times. This "frequently asked questions" list is directed toward the amateur astronomer who is looking for starting points. Approximate Astronomical Positions -- Astronomical calculations including co-ordinate conversion, position and circumstances of the Moon, and positions of the planets. Designed for programmable calculators, spreadsheets and illustrative applications where high accuracy is not needed. Comparison of simple methods with more accurate data over various time periods. Most methods are coded as QBASIC and VBA applications as well as showing example calculations. AstroTips - Astronomy Freeware and Shareware -- Information on selected astronomy free software. Read a comment, see a screenshot and download. Astronline -- [free MS-Win] Screen saver with 748 images. Also eclipse links. Astronomy Formulas -- by James Q. Jacobs. Lunar and solar periodicity formulas, definitions, time formulas, notation, astronomical constants with computer code for a programmable HP 48. Astronomy Software on Planet S -- A list of links to astronomy software on Planet S, a search directory of astronomy, space, and physics only web sites... by ExploreSpace.com. Astronomy-related software -- A list of many astronomy-related programs. Cartes du Ciel / Sky Charts -- This freeware allows you to draw sky charts according to the data of 15 catalogs of stars and nebulae, as well as the position of planets, asteroids, and comets. The software is available in English and is translated in 8 other languages. Computing planetary positions -- A detailed online tutorial on how to compute planetary positions. EVCODE -- A stellar evolution simulator designed for astronomy education. Engineering, Science and Math Applications on Linux -- A large indexed collection of pointers to Linux applications. GeoAstro Applet Collection -- Interactive Java applets display the position of sun and moon on the horizon for any date, time and location, and on a world map GeoClock -- [shareware MS-W] Sunlight clock with world times and sun and moon positions and coverage. Hubble Space Telescope -- Wallpaper -- [commercial - Win95/98/NT] Thirty full-screen Hubble photos for use as wallpaper and screen saver. Kairos General Calendar Conversion Program -- [commercial, demo available -- Win95/98/NT] Includes calendars required by historians of astronomy and general historians. Many details are provided for Indian and Jewish calendars and much besides. There is also a display of positions of the Sun, Moon and planets, effectively replacing Tuckerman''s tables. A horoscope display, and details of lunar visibility, are calculated from modern parameters. Ksetiwatch - a monitoring tool and work unit manager for SETI@home -- Ksetiwatch monitors multiple SETI@home clients and automatically logs and manages completed work units. Linux for Astronomy cdrom -- [commercial - Linux] 3rd release, over 1.5Gb of astronomical packages prebuilt for Linux plus thousands of documentation pages, an 8000+ astronomy URL database and more. LinuxAstro -- Astronomical software on Linux. Nightfall -- [open source - Linux/Unix] Interactive program for computing synthetic lightcurves and generating animated views and best-fit models of eclipsing binary stars. Outer Space CD Image Gallery -- Over 1,000 unique and rare images of outer space, the space program, etc. Great educational tool. Images are copyright-free. Secure online ordering. SAL - Physics & Astronomy Software -- A collection of information and links by Scientific Applications on Linux (SAL). Sky and Telescope -- Astronomical software -- Links to the BASIC programs that appeared in Sky & Telescope, to shareware/freeware astronomy related software and to vendors of astronomy software.
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