By Gerald North BSc (auth.)
Every 12 months huge numbers of individuals absorb the examine of astronomy, normally at beginner point. there are many effortless books out there, packed with vibrant images, yet missing in right reasons of the way and why issues are as they're. many folks ultimately desire to transcend the 'coffee-table booklet' degree and learn this interesting topic in larger intensity. This ebook is written for them. additionally, many folks sit down for public examinations during this topic every year and this e-book can also be meant to be of use to them. all of the themes from the GCSE syllabus are lined right here, with pattern questions on the finish of every bankruptcy. Astronomy Explained offers a entire remedy of the topic in additional intensity than is generally present in straight forward works, and should be of curiosity to either beginner astronomers and scholars of astronomy.
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Extra resources for Astronomy Explained
It was not until AD 1492 that Christopher Columbus finally dispelled doubts about the true shape of the Earth when he partially circumnavigated it! The principle of Eratosthenes's method is illustrated in Fig. 1. 24 The Earth in the Solar System 25 Location A = Alexandria Location B .. Syene C .. 1 Eratosthenes' method for finding the size of the Earth. 2 The Earth in the Solar System Running counter to the religious dogma of the time, ideas that the Earth orbited the Sun were stifled and the Greek scholars stayed with the idea of the central Earth, or "geocentric theory".
At what time GMT will Betelgeux transit the observer's meridian at Flagstaff? 0 (d) (e) 10 At a certain instant at Meudon Observatory in France (longitude = 2° 14' E) on 4 February a sundial read 12h 45 m • What is the Greenwich Mean Time at thi instant? ) 43 Questions 11 Find out about and write a paragraph on each of the following: (a) leap seconds, (b) International Atomic Time. 12 r ee from my notebook that I ob erved a particular object, a star clu ter in Hydra, on 16 February 1994. However, I had forgotten to write down the time I observed it, although I had noted that it wa clo e to its greatest altitude.
In 1600 Giordano Bruno was burnt at the stake, in part for his teachings of the Copernican, rather than the Ptolemaic, view of the structure of the heavens. It was left to Galileo (between 1609 and 1611) to provide practical proof for the heliocentric model. With the newly invented telescope he discovered mountains 26 The Earth and Time and craters on the Moon and sunspots, which shook the view that the heavens were perfect and unchanging. He also discovered that the milky band of radiance that crossed the starry sky - the Milky Way - was composed of innumerable faint stars.