Musing -- [Part I.] The universe. Christian Doppler and his effect -- Measuring distances in the universe -- Edwin Hubble's expanding universe -- A weird and wonderful universe -- [Part II.] Matter and the universe. The nature of matter -- The big-bang hypothesis -- How matter can clump together -- The universe develops structure -- [Part III.] Stars, stellar clusters and galaxies. The first stars are born, live and die -- The formation of globular clusters and galaxies -- Making the sun : and similar stars -- A crowded environment -- [Part IV.] The solar system. Understanding the nature of the solar system -- Introducing the planets -- Satellites galore -- 'Vermin of the sky' and other small bodies -- Planets galore -- [Part V.] Forming the solar system. Making planets -- Shrinking orbits and the survival of planetary systems -- Now satellites form -- What can be learnt from meteorites? -- A little-bang theory and the terrestrial planets -- The moon : its structure and history -- The very small planets : Mars and Mercury -- Smaller bodies of the solar system -- The origin of isotopic anomalies in meteorites -- [Part VI.] Life on Earth. The Earth settles down : more-or-less -- What is life? -- Forms of life -- Nineteenth century genetics : the survival of the fittest -- Twentieth century genetics : the alphabets of life -- Life begins on Earth -- The restless Earth -- Oxygen, ozone and life -- The evolution of life : from Archaea to early mammals -- Early mammals to man -- Man and the Earth -- Musing again