1 “... CCD images of the planet. Peter Grego is an accomplished author, an experienced amateur astronomer who...”

2 “...ASTRONOMERS’ OBSERVING GUIDES provide up-to-date information for amateur astronomers who want...”

3 “... the Earth is - have always been regarded as difficult and even dangerous targets for amateur astronomers...”

4 “.... It explains how sky watchers and amateur astronomers can practically follow comets, observe them, and record...”