1)   EarthWatch 4.01
EarthWatch displays a graphical world clock with a dynamic map image of the world showing the day and night areas, a sundial, and an information panel featuring sunrise/sunset times and much more -- all in real-time or time-lapse animation.
earthwatch, world clock, chronograph, chronometer, astronomy, earth, world, map, sundial, time,

 2)   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.
Moon, lunar, phase, eclipse, Sun, solar, annular, date, calendar, calculator,

 3)   StarStrider 2.8
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 galaxies, nebulas, and hundreds of thousand of stars - in real-time 3D.
astronomy, planetarium, star, map, 3d, planets, sky, trek, education, science,

 4)   Click Clock 2.0.0
Animated weather radar & satellite, local temperature in tray, local weather, internet time sync, sun/moon rise, map, animated moon phase, planets, eclipse, equinox/solstice, meteors, dictionary, thesaurus, calculator, full year calendar, 27 holidays
weather, clock, calendar, radar, satellite, temperature, astronomy, map, moon, phase,

 5)   MaterialWorlds Simulations 1.5
Live interactive physics simulations let you explore the Solar System (orbits, seasons, gravity, tides, comets and satellites), play snooker and experiment with Laws of Motion, bridge,crash,ideal gas,pendulum clock and siege engine simulations.
virtual reality, science, physics, experiments, simulation, games, solar system, geocentric, astronomy, earth,

 6)   Adastra FREESTAR 4.02
Experience accessible astronomy with a real-time sky, comprehensive reports, arcsecond accuracy, and exciting events such as animation and live tracking.
astronomy, astro, astronomical, planetarium, sky, skymap, star map, celestial atlas, coeli, stella,

 7)   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.
ephemeris, ephemerides, astronomy, planetary positions, lunar positions, celestial mechamics,

 8)   Chinese Calendrics 7.35
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.
chinese, calendar, date, year, astronomy, moon, calendrics, lunar, solar, julian,

 9)   Science Quiz 2
For students aged 9 - 12 in Primary 3 - 6. There are over 2000 challenging Science quizzes and structured questions to practise on. Topics include Matter, Living and non-living things, Plants, Animals, Reproduction, Energy, Forces, Machines, etc
Primary, School, learn, education, test, papers, questions, exam, quiz, grades,

 10)   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).
orrery, planets, asteroids, planetary positions, solar system, astronomy, satellites, ephemeris,

 11)   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, twilight, the lunar phase and the horizon. Includes database of towns for Australasia, Canada. UK and USA.
photography, astronomy, sunrise, sunset, moonrise, moonset, phase, solar, lunar,

 12)   Solar System 3D Simulator 3.0
Solar System 3D Simulator is a FREE software application that generates a realistic solar system model and planets in 3 Dimension on the PC using advanced physics formulas. It can display the planets and their orbits, the sun and the moon.
solar, system, physics, astronomy, science, fair, projects, planet, sun. moon, earth,

 13)   AstroGrav (Windows) 1.2.2
A software program that allows you to study how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within an astronomical system, while watching how it evolves.
AstroGrav, interactive, educational, software, program, Mac, Windows, helps, teachers, students,

 14)   Coeli - Stella 2000 6.0.3.1
Complete astronomy software suite exploring realistic skies in real time, with observing log, Live Orbits, Sky Quiz, spoken guidance, A-Z encyclopedia, and a concentrated search embracing planets, comets, asteroids, DSOs, and 300,000 stars.
Astronomy, Planetarium, Sky Simulator, Orrery, Atlas, Skymap, Starmap, Stars, Planets, Comets,

 15)   EasySky 3.01.15
Astronomy software, shows you the complete night sky (340,000 stars) and our solar system in a 3D orrery view with the planets, asteroids, and comets from any place at any time. Many animation options, printing.
Astronomy, Planetarium, Stars, Asteroids, Comets, Orrery, Planets,

 16)   Planetarium 1.33
See 2500 stars, all 88 constellations, planets and the moonphase from 4713 BC to 9999 AD from any location on earth. Print todays night sky ! Nice visuals, smooth animation, simple controls, good planet data too.
Planetarium, Astronomy, Software, Moon, Planets,

 17)   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.
astronomy, education, hobby, planetarium, planets, science, sky, space, stars,

 18)   Astro-Mania 2.0
Astro-Mania is an educational game covering the Universe. It has eight levels and let's you choose what subject area you want to cover. Its great pictures and ease of use makes it not only educational but also fun.
astronomy, universe, star, game, education, k12, fun, planet, asteroid, galaxy,

 19)   300 Science Quizzes 1.0
300 Science Quizzes: 150 Capital city quizzes, 120 Chemistry and Periodic Table quizzes, 20 Astronomy picture-quizzes and 10 questions about the speed of light for middle and high school students.
science, quiz, chemistry, geography, capital cities, middle school, high school, light, astronomy, planets,

 20)   AstroGrav (Mac) 1.2.2
A software program that allows you to study how astronomical objects move and interact under the force of gravity. It features superb interactive 3D graphics which allow you to move around within an astronomical system, while watching how it evolves.
AstroGrav, interactive, educational, software, program, Mac, Windows, helps, teachers, students,