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The PF-L Assist app helps you to align the equatorial mount of your telescope to the north celestial pole or south celestial pole in order to make it …

The Moon Book App clearly shows you when and from which direction eclipse of the moon can be viewed.A total eclipse of the moon occurs on April 4, 201 …

The Comet Book App clearly shows you when and from which direction Comet can be viewed. The direction and elevation of Comet can change noticeably in …