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Galaxies are not close to each other. Hence, perhaps at one point, there were star clusters at one place and galaxies closer to each other.
The brilliant, Greek mathematician and astronomer, Eratosthenes of Cyrene had an easier way of using geometry in determining the size of the earth (Woolfson 22). He assumed that the sun was miles away, perhaps compared to the distance between the ancient city Cyrene and Alexandria in Egypt where he was the chief librarian. Hence, concluding that the rays from the sun at these locations must have been parallel. There is an error in this assumption because the sun is in constant motion and Cyrene is also due south of Alexandria. Hence, such parallel angles in locations, as he suggested are likely to change.
Though Ptolemaic system had several observable failings, it still remained as an accepted science for more than 1800 years (Woolfson 24). Perhaps it is because it was a geocentric model which had unanswerable questions which were mostly based on rational reasoning. In addition, the Catholic Church in the middle ages had supreme authority and had widely accepted Ptolemy’s philosophy. Therefore, any person opposed to the geocentric system got punished because the person was guilty of heresy, a crime at time.
Galileo proved that the sun was at the centre, based on several observations he made about Venus (Woolfson 34). By using the telescope he saw that Venus had similar phases to the moon. The nature of these phases was only explainable if Venus was going around the sun. Through this he found out that Earth orbits around the Sun, proving that the Sun is at the centre.
During Nicholas De Cusa’s time in 1401 to 1464, The Catholic Church was not the supreme authority because his views showed that he believed that each religion is of equal value. During Giordano Bruno’s time in 1584, The Catholic Church had a lot of powers sentenced people to death for a crime such as witchcraft (Woolfson 35). Hence, the
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In ancient civilizations constellations were used for astrology or myths. Astrology is where stars and planets are tracked in order to predict an individual or society’s future. Constellations like Orion, Mars, and Jupiter
Such movements include the fact that the sun rises in the morning from eastern sky and sets in the evenings at the western sky. Some different stars can also be observed at different times of the year. Moreover, the moon can be seen at different dates of the month.
Planets circles have to a great degree little contrast between the significant and minor tomahawks of the ovals (Moltz, 2014).
In regards to Copernican model, Galileo found that earth was not the center of all things. He also found that Venus showed a complete
This new theory is known as the "Rare Earth Theory" (by Ward and Brownlee). Do some research on this new theory and identify what the key components of this theory are that suggests planets like the Earth are much rarer than we think they are.
2. A dramatic new view
Astronomy is classified as a natural science that included the study of celestial objects such as stars, moon, planets, galaxies and nebulae. In addition, it also deals with the physics, chemistry, and the objects evolution, and phenomena that originate outside the earth’s atmosphere.
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