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This is a page for my collection of calculator utilities, which are being updated all the time. I created them with the aim of helping amateur astronomers with the mundane calculations for optics and telescopes, and for conversions. The program also calculates planetary/lunar ephemerides, orbit properties, and downloads live images of the Sun, satellite tracks and auroral ovals from the internet.

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The main menu of the Version 1 program.
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The main menu of the Version 2 program.
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The planetary ephemeris calculator of the Version 2 program.


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