Your Sky, the interactive planetarium of the Web Your Sky's Virtual Telescope is your Humble Soft Telescope of the Web. Controls allow you to set time and date, aiming point, orbital elements to track an asteroid or comet, and a variety of viewing options. You can compose a request with custom settings and save the results in your browser's hotlist or bookmark table, allowing direct access to the virtual telescope with all the controls preset to your own preferences.
In September 2008, both of the distant planets Uranus (in Aquarius) and Neptune (in Capricorn) should be visible for those of us in North America. However, the downside is that even with a moderately strong telescope, the planets will likely only appear as tiny blue-green dots.
Even those of us without any telescopes at all can gaze at the beauty of the universe and the full wonder of the night sky with these astronomical downloads.
1. Solar System 3D Simulator - Rather than using impressive, realistic photos from across the universe, this 3D-modeling software lets students and hobbyists generate a replica of the solar system based on realistic physics models.
2. CyberSky - This planetarium shareware provides information about astronomical objects in an attractive and intuitive interface. The software also includes several options for creating and printing celestial maps from the perspective of any location on Earth.
Marble is a Virtual Globe and World Atlas that you can use to learn more about Earth: You can pan and zoom around and you can look up places and roads. Marble is Free Software / Open Source Software and promotes the usage of free maps. And it's available for all major operating systems (Linux/Unix, MS Windows and Mac OS X).
Digital Universe Atlas Since 1998, the American Museum of Natural History and the Hayden Planetarium have engaged in the three-dimensional mapping of the Universe. This cosmic cartography brings a new perspective to our place in the Universe and will redefine your sense of home. The Digital Universe Atlas is distributed to you via packages that contain data products, like the Milky Way Atlas and the Extragalactic Atlas, and requires free software allowing you to explore the atlas by "flying" through it on your computer. The latest version of the Digital Universe atlas is chock full of new data, including over 1 million galaxies, L and T dwarf stars, a 3-D Orion Nebula terrain model, Abell galaxy clusters, large-scale density contours, and plenty of additional data updates.
(Version 3.6 is a 183mb download, 467 MB disk space required)
Solar Weather Browser The Solar Weather Browser (SWB) is a software tool developed by the Royal Observatory of Belgium for easy visualisation of solar images in combination with any context information that can be overlaid on the images and that is space weather relevant.
NightCal is a simple, practical tool for basic observation session planning. It is designed to produce a monthly calendar telling you when it gets dark, when the Moon rises and sets and what the Moon should look like when it does make an appearance. It also provides data on the elongation of the inferior planets and a quick aide mémoire for planetary conjunctions.