Free, Open Source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors.
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A new image of NGC 2264, also known as the 'Christmas Tree Cluster' released by NASA, shows the shape of a cosmic tree accompanied by colourful, twinkling lights. Separate images captured by the Chandra and other telescopes have been synchronised together to make a beautiful picture for the holiday season!, Technology & Science News, Times Now