Home & Hobby Software - Astronomy Free Downloads

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Alcyone Ephemeris 1.0.1
Alcyone Ephemeris is an accurate and fast astronomial ephemeris calculator covering the period 3000 BC to AD 3500. It calculates heliocentric, geocentric, and topocentric positions of the Sun (Earth), Moon, and planets in ecliptical, equatorial, and horizontal coordinates, with optional corrections for parallax and refraction; rectangular coordinates, velocity, acceleration, apparent diameter, magnitude, phase, lunar libration and more.
Chinese Calendrics 7.32
A program to convert between dates in various Chinese calendars and dates in the Gregorian and Julian calendars, and to find lunar new year's day and leap months for any year in the Chinese Calendar. Can list anniversaries of Chinese lunar dates such as birthdays. Supports 60-year, 60-month and 60-day cycles, includes Chinese names, and allows searching for dates and times of full moons, dark moons, solar terms, equinoxes, solstices and more. German
Coeli - Stella 2000 6.0.3.1
Complete astronomy software suite exploring realistic skies in real time, with observing log, Sky Quiz, Live Orbits (orrery), telescope support, spoken pronunciation guide, a half-million word Encyclopedia Astronomica, and concentrated searches embracing planets, comets, asteroids, DSOs, and up to 300,000 stars.
CyberSky 3.3.1
CyberSky is an exciting, entertaining, and educational astronomy program that transforms your personal computer into your personal planetarium. CyberSky provides an excellent way to learn about astronomy and to explore the wonders of the sky visible in the distant past, the present, and the far-off future.
Dr. Regener Sun-Moon-Calendar 7.1
Calculates Sets, Rises and Phases of Sun and Moon; over 2000 Locations in 110 Countries; Signs of Zodiac, Saint's Days, Days of Eclastical Year; the Moon in the Ecliptic; Graphical Overview of Moon Brigthness; Timezone Information and Comparison; absolute local Accuracy by Management of Own Locations; pretty Daily Graphic; easy Navigation and additional Search Funcitons; Sientific Calculation Methods; print Your own Professional Reports German
GrandTour 4.1
GRANDTOUR creates accurate wireframe scenes from Voyager or Giotto spacecraft, and from space or Earth (spacecraft visible). User has considerable control over time, field, etc., and many frames/second are generated. Developed at JPL to assist in analysis of science and optical navigation data, it was also filmed by the BBC/NOVA for a Voyager documentary. Conveniently runs from any Windows/DOS.
Julian Day Converter 1.0
This utility can convert a gregorian date into julian day format/Modified Julian Day format and vice versa. The Julian Day Format counts the day since the 24th november -4713bc. The julian day format is often used in the astronomical section to calculate for example rises. German
Lunar Calendars and Eclipse Finder 7.32
A program to search for eclipses (lunar, solar, total, annular and umbral), to calculate the phase of the Moon at any given date and time and to convert between dates in the Gregorian and Julian calendars and dates in four lunar calendars (Goddess Lunar, Meyer-Palmen Solilunar, Hermetic Lunar Week and Liberalia Triday). German
Moon Phase Calculator 2.01
Moon Phase Calculator is simple and easy to use tool that allows you to calculate the phase of the Moon for any time in the past or future and to search for the next or previous full moon, new moon or first or last quarter.The day, month, and year can be changed using the keyboard or mouse buttons on the calculator. Moon Phase Calculator is free, it has small size and user frendly interface. Download it now!
Planet's Orbits 1.7.0
Planet's Orbits (for Windows 98/ME/2000/XP) is an accurate digital orrery with a wealth of functionality. The program uses the DE404 ephemeris (accurate for dates between 2000 B.C. and 6000 AD) for the calculation of planetary (except Pluto) and lunar positions. The calculation of the positions of the satellites of Jupiter, Saturn, and Uranus is done by the various analytic theories given in the Explanatory Supplement to the Astronomial Almanac.
StarStrider 2.8 Popular!
StarStrider is a software planetarium that utilizes the latest in 3D-technology in order to show you not only the planets and satellites of our solar system, but also the more than 100 000 stars , all in real-time 3D. You'll also find galaxies, nebulae, supernova remnants, and the band of the Milky Way. StarStrider combines photo realism and scientific accuracy with plain fun and beautiful vistas! Optional add-on with 2 million stars!
World Almanac 4.3.0
The World Almanac displays solar and lunar data for every 30 minutes throughout the day in addition to the times of rise, set and twilight, the lunar phase and a picture of the horizon. Includes database of towns for Australasia(Aus/NZ), Canada. UK and USA covering more than 1600 locations. Although this software was specifically designed for somebody with a camera, it will also appeal to astronomers, fishermen, gardeners and many others.

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