You are mistaken if you believe that the dream of conquering space and interplanetary travel originated in the 19th and 20th centuries. Already the priests of Ancient Babylon and Chinese astronomers about 5000 years ago had primary ideas about space and celestial bodies. Thales of Miletus (6th century BC), often called the father of Greek astronomy, founded the school where it was probably first suggested that our planet was not flat at all. And another Greek scientist, Aristarchus, in 280 BC. e. I even tried to measure the relative distance of the Sun and Moon from the Earth... The next book in the series tells about one hundred of the most amazing and incredible secrets of astronautics.