Strictly spoken it's a piece of software, simulating the Solar System's bodies in 3D on your Windows or Linux PC (will work in most *NIX's as well).
In difference to quite a few other programs it does so in realtime.
... ... The free space simulation that lets you explore our universe in three dimensions. Celestia runs on Windows, Linux, ... of the Earth. You can travel throughout the solar system, to any of over 100,000 stars, or even ... is seamless; the exponential zoom feature lets you explore space across a huge range of scales, from .... Free download of Celestia 1.6.1
... (iii) Convert between dates in various calendars: two solar calendars (the Gregorian Calendar and the Julian Calendar) ... previous eclipse of a certain type: lunar or solar, lunar, total lunar, total or umbral lunar, solar, total solar or annular solar. .... Free download of Lunar Calendars and Eclipse Finder 14.19
... popular method for explaining recent observations that the universe appears to be expanding at an accelerating rate, ... significant portion of the missing mass in the universe. Two proposed forms for dark energy are the ... requires high-precision measurements of the expansion of the universe to understand how the speed of the expansion .... Free download of Dark Solar System 2011
This shows the position of the sun and moon for any place on earth between 1900 and 2049. It can show the sun or moon for any day or the horizon which can be rotated 360 degrees and animated. A database of over 1600 locations is included which includes the name, .... Free download of Sun & Moon Calculator 4.4.2-1
... spoken it's a piece of software, simulating the Solar System's bodies in 3D on your Windows or Linux ... them (time and spaceship contol). History OpenUniverse (OU) was formely known as Solar System Simulator (Ssystem). It was initially released on Nov ... version 1.2 added a whole bunch of moons. Solar System v1.6 then added more ways of movement .... Free download of OpenUniverse 1.0 Beta 3
... events, principally dark moons and winter solstices. The solar calendar consists of a series of seasonal years ... divided into 12 or 13 lunar months. A solar year always begins at the (northern) winter solstice. ... between dates in the Chinese, Vietnamese and Japanese solar and lunar calendars and dates in the Common .... Free download of Chinese Calendrics 14.19
... not only the planets and moons of our solar system, but also hundreds of thousands of other stars. ... Doppler-shift effects - travel in a true Einsteinean universe rather than in Newtonian fashion. - Use controllers .... Free download of StarStrider 2.8.6
... an excellent way to learn about astronomy and explore the sky visible in the distant past, the present, and the far-off future. CyberSky can display and print attractive, highly-customizable maps of the sky as seen from your home, your favorite vacation spot, or any other location on the Earth. The .... Free download of CyberSky 5.0.3
EZ Open includes many features. If you are not familiar with EZ Open here is a good description. EZ Open checks the weather. It can go faster than ... Internet Browser. But, there is something different. EZ Open includes fourteen tabs! These tabs can run as ... Updates/About Tab, and a Survey Tab. EZ Open was made so there was no extra software .... Free download of EZ Open 5.0
An accurate simulation of the solar system, including all planets, major moons, all visible stars, and constellations. Multiple views and features. Home in on selected planets, or fly to distant stars quickly and easily. Support for .... Free download of SolarMax 1.0.9