2 Ebooks by Sean G. Ryan
Sean G. Ryan: Visual Astronomy with a Small Telescope
This is a practical guide to using a small astronomical telescope of a size that corresponds to most "first" telescopes – around 75-150 mm, i.e. 3-6 inches, in diameter.Visual Astronomy wit …
PDF
Inggeris
DRM
€29.65
Sean G. Ryan: Visual Astronomy with a Small Telescope
This is a practical guide to using a small astronomical telescope of a size that corresponds to most "first" telescopes – around 75-150 mm, i.e. 3-6 inches, in diameter.Visual Astronomy wit …
EPUB
Inggeris
DRM
€29.56
