1 “...Given the fact that there are perhaps 400 million stars in our Galaxy alone, and perhaps 400...”

2 Table of Contents: “... for life -- Island universes: the marvels and wonders of galaxies -- Stretching the cosmos: a universal...”

3

4 “...Allein in unserer Galaxie gibt es etwa eine Milliarde erdähnlicher Planeten. Im sichtbaren...”