By Sun Kwok
If you've ever desired to comprehend the fundamental ideas of astronomy and celestial activities, you want to read this ebook. utilizing images of the sky saw from assorted areas on the earth, in addition to drawings of historic astronomical tools and instruments, Prof. sunlight Kwok tells this tale in an exciting and interesting way.
Since the start of human civilization, humans have questioned concerning the constitution of the cosmos and our position within the Universe. greater than 2,000 years in the past, our ancestors knew that the seasons have been unequal, the Earth used to be an unattached item floating in area, and stars existed that they can now not see. From celestial observations, they concluded that the Earth used to be round. utilizing basic instruments and arithmetic, historic astronomers correctly decided the sizes of the Earth and Moon, the gap to the Moon, and the lengths of the months and 12 months.
With a shrewdpermanent equipment referred to as the armillary sphere, Greek astronomers may are expecting the days of dawn and sundown on any day of the yr, wherever on the earth. They built subtle mathematical types to forecast Mars’ motions hundreds of thousands of years into the long run.
learn the way historic observers accomplished those outstanding feats. With minimum use of arithmetic, this publication retraces the footsteps of our ancestors, explains their highbrow trips basically, and explores the philosophical implications of those discoveries.
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