Link : stellarium.org
What you need :
- Linux/Unix; Windows 7 and above; Mac OS X 10.11.0 and above
- 3D graphics card which supports OpenGL 3.3 and above
- 1 GiB RAM or more
- 1.5 GiB on disk
Whether you’re an amateur astronomer or just enjoy gazing at the night sky, Stellarium will broaden your horizons. This open-source gem of a program will tell you precisely what you’re looking at and let you explore the outer reaches of known space. You’ll discover the names and positions of millions of stars, and be able to view them as they look from Earth or from other planets nearby.
(1) Move your mouse to the bottom left to reveal the menu, then click the Location icon at the top (or press F6). In the box that opens. search for your nearest city or enter your precise longitude and latitude.
(2) Stellarium uses your PC’s clock to set the date and time, but you can adjust this in the ‘Date and time’ window (opened by pressing FS). You can also use the controls at the far right of the menu at the bottom to fast-forward or rewind through time.
(3) Press F2 to search for a particular planet, star or other celestial body (you may need to zoom in to see it). Detailed information about the object Is displayed on the left.
(4) To open a Stellarium demo script, press F2, select Scripts, then choose from the list on the left. Click the Play button (bottom left) to run the demo.
Video of this is at end of the post.
With your left mouse button, you can shift the field of view, while zooming in and out with your scroll wheel. Alternatively, you can use your keyboard’s arrow keys -holding down the Shift key slows your movement, while holding Ctrl lets you zoom using the up and down arrow keys. For more keyboard controls and shortcuts, press F1.
Once you’ve got to grips with the basic controls, try running one of the many demo scripts (see 4 below), which take you on a brief tour of specific aspects of the night sky. This new version adds the Martian Analemma demo script, which shows you the position of the Sun over the course of a year as seen from Mars.
Version 0.19 also adds five new ‘sky cultures’ that let you browse constellations as named by different civilisations, including two from ancient Babylonian times (press F4, select the Starlore tab, then choose from the list on the left). English-language translations are now provided for all sky culture labels.
The default Stellarium font size is small, which can make it difficult to read on smaller screens. This version makes things more legible by letting you increase the font size for menus and star labels. However, as we discovered, setting it too large can mean some labels get cropped. Bear in mind, a long-standing bug means your cursor won’t be visible if you use Windows’ mouse trails feature, so you’ll need to temporarily disable this if you want to use your mouse.