Peter Grego

Mars and How to Observe It

2012 · ENGLISH · PDF

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Astronomical Cybersketching. Observational Drawing with PDAs and Tablet PCs

2009 · ENGLISH · PDF

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Galileo and 400 Years of Telescopic Astronomy

2010 · ENGLISH · PDF

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The Moon and How to Observe It (Astronomers' Observing Guides)

2005 · ENGLISH · PDF

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Venus and Mercury, and How to Observe Them (Astronomers' Observing Guides)

2008 · ENGLISH · PDF

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Galileo and 400 Years of Telescopic Astronomy (Astronomers' Universe)

2010 · ENGLISH · PDF

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The Moon and How to Observe It (Astronomers' Observing Guides)

2005 · ENGLISH · PDF

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Venus and Mercury. And How to Observe Them

2008 · ENGLISH · PDF

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