Posts Tagged ‘ebook’’s free Moon ebook

Astronomy magazine is offering a free short ebook about observing the Moon in various phases, with descriptions of the best features during the various phases.  The photo maps list the large features visible to the naked eye, binoculars, and small telescopes.

Download Free Black Holes eBook

Sky and Telescope is offering a free black holes eBook: This free eBook from Sky & Telescope magazine includes four articles from the experts, who explain various aspects of black holes. “A Quasar in Every Galaxy?” by Robert Irion summarizes observations and theories about the supermassive black holes that lurk in the core of almost […]