Why it is cold when the Earth is closest to the sun. Why we see Venus in the morning. The planets are close, the stars unreachable.

Day and Night. A gigantic Sun with tiny planets. A look at the Zodiac. The solar system is the present; the stars are the past.

The Sun is on time but the Moon is late. Why we see the Moon as a crescent. The half-moon crosses the Earth's orbit. Where the Moon came from. The Moon: Delay in space and Time.

Discovering Mercury. Distant moons of other planets. Why we always see the same side of the Moon. Why we see the Sun so low but the Moon so high.

Earth's Rotation. The Moon shows us where Mars is. Copernicus: The Earth in orbit. Why the Earth turns. Crossing time zones.

Hidden planets. Kepler discovers the planets' timetable. The Earth moves more quickly in Winter. Earth overtakes Mars. Why we have two tides every day.

Why the Earth is round. Newton's apple. Why the Earth does not fall into the Sun. Three minutes more Sun every day. Sundials and the Earth's axis. Comets.

Columbus and the Pole Star. Earth wobbles over the centuries. The imaginary 'heavenly vault'. The Sun, our star. Infinitely large to infinitely small.

Leap Days: The Earth misses a quarter of a day. Gregorian and Orthodox calendars. Solar and lunar calendars. Solid and gaseous planets.

The half-moon shows where we are going. Where the stars go during the day. The Moon and the planets: The Sun's invisible companions. The Moon's shadow on the Earth: Solar Eclipses.

Annular solar eclipses.