Best astronomy software for free download

This space screensaver includes over forty INCREDIBLY DETAILED IMAGES of spinning galaxies, colorful nebulae, supernova remnants, solar system planets and other amazing celestial bodies. Take your mind to the heavens every time your computer is idle!
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Chronos Atomic Clock Synchronizer is a utility for people who need their computers to use exact time. The programconnects to various atomic clock timeservers and synchronizes your internal clock with time provided by theseservers.
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Take a Virtual Tour of Mars-3D. 4GB on DVD... Better than books on Mars. Covers 3 years of the MER Spirit Mission. VRPresents hobby software for people interested in astronomy, cosmos, planets, solar system, space flights, stars. Similar to 3D games.
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Beautify your desktop with this stunning Cosmic wallpaper generator. Every day, hour, or less, Cosmic Scenes will create a beautiful and original 3D Cosmic image and install it as your desktop wallpaper.
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Basic planetary data in the form interesting for both kids and adults is given alongside. It is planet name and astronomical sign, distance from the Sun, dimensions, information on satellites, atmosphere and internal composition.
Developers goal in creating this screensaver was to make Solar system astronomy known to schoolkids in an easy and fun way.
Parents simply need to install an educational screensaver on kid`s computer. Then wait for several days and ask what planets of Solar system your kid knows - and you are going to be surprised by the plenitude of the answer received!
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See the brightest 2500 stars, all 88 constellations, all nine planets and the moonphase from 4713BC to 9999 AD from any location on earth. Click star on screen for detailed information. Geocentric and heliocentric views also available. Define your own five locations for quick switch. Tiny program, but great planetarium, especially for teachers and students. Print todays night sky ! Nice visuals, smooth animation, simple controls, good planet data. This is the Windows version of the classic Planetarium software of 1992. The DOS version didn't work with todays fast computer anymore. But it was downloaded for 13 years, and one of the first of its kind, especially the animantions and colors. If you need a quick overview when and where a planet, star is, this is your perfect joice. And it is really for free, no registration required. So try it and see yourself !
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The Chinese Lunar Calendar is a solilunar calendar, consisting of months corresponding exactly to lunar cycles and years which stay more-or-less in sync with seasonal years. The structure of the calendar depends on the exact times of certain astronomical events, principally dark moons and winter solstices.

The solar calendar consists of a series of seasonal years which are divided into 24 "solar terms". The lunar calendar consists of a series of years which are divided into 12 or 13 lunar months. A solar year always begins at the (northern) winter solstice. A lunar month always begins on the day of a dark moon.

Chinese Calendrics is used to do the following:

To convert between dates in the Chinese solar and lunar calendars and dates in the Common Era and Julian calendars.
To calculate the date of New Year's Day in the Chinese lunar calendar.
To ascertain the Western dates of the starts of all lunar months in a year in the lunar calendar.
To find leap months in the lunar calendar.
To find the Western dates corresponding to Chinese anniversaries (e.g., birthdays).
To move forward or backward from a given date (and time) either by a period such as a month (Western or Chinese) or by any number of days.
To calculate the phase of the Moon for any time within a 6000-year period.
To search for the next or previous full moon, dark moon, lunar quarter, solar term or solstice or equinox of a certain type.
To search for a solstice or an equinox in combination with a dark moon or a full moon.
To search for the next or previous day, month or year with a certain element-animal correspondence (e.g., the next water-rabbit year or the next fire-chicken day).
To find days for which the element-animal is the same for day, month and year.
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A stunning and mesmerizing 3D screensaver that takes you on a never-ending voyage into the depths of Space. Soar past stars and nebulae and experience the wonders of the Universe without the usual negative consequences of extended space travel ! Marvel at the never-repeating beauty of this unique visual feast. Cosmic Voyage uses fractal mathematics to create a unique Universe every time. Highly configurable, and can play your favorite music too !
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Does astronomy intrigued you? Do you often look into the sky at night and marvel at the wonderous reaches of space?The moon is the closest celestial object to us. But did you know that the same side of the moon always faces the earth no matter where the moon is in the sky or what phase the moon is in. The back side of the moon is never seen from the earth. And that is referred to as the dark side of the moon. But the dark side of the moon is not always dark. The sun could be shining on it, but we cannot see it because that side of the moon is never in view from earth.If you have an interest in astronomy or lunar events, Moon Glimmer will enable you to monitor the lunar phases without stepping outside. If it raining, snowing, or just plain cold to go outside, you will know the current moon phase right on your computer.Moon Glimmer is extremely easy to use. Just start the program and it will show you the current lunar phase based on the time and date of your Windows clock.Moon Glimmer will show you graphically display of the current moon phase and other crucial information such as moon age, distance, ecliptic latitude, and ecliptic longitude.If you are an amateur astronomer, you will find Moon Glimmer to be a useful tool.
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This software allows you to: (i) Display the current phase of the Moon. (ii) Calculate the phase of the Moon for any time in the past or future within a 9000-year period. (iii) Convert between dates in various calendars (three solar calendars, the Gregorian Calendar, the Julian Calendar and the Solar Liberalia Triday Calendar, and three lunar calendars, the Goddess Lunar Calendar, the Meyer-Palmen Solilunar Calendar and the Lunar Liberalia Triday Calendar). (iv) Move forward or backward from a given date (and time) either by a period such as one month or by any number of days. (v) Search for the next or previous full moon, dark moon or first or last quarter. (vi) Search for the next or previous eclipse of a certain type: lunar or solar, lunar, total lunar, total or umbral lunar, solar, total solar or annular solar.
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