NATS 1745 Chapter Notes - Chapter 2: Sirius, February 29, Red
16 Apr 2018
School
Department
Course
Professor
Document Summary
For them, the sky was a mirror of the earth, so by monitoring the sky the emperor could check what was happening in china; the main emphasis was astrology (but on a national level) The planets moved in regular and predictable patterns, it was comets that showed heavenly order breaking down. Supernovae indicated that something was very amiss by having upset the harmony of the heavens, and predicted terrestrial violence. The crab nebula is the visible remains (glowing gas cloud) of a supernova witnessed by the. At the heart of the remains lies a spinning relic of the explosion, the crab pulsar which was formed when the core of the supernova collapsed. We know it"s just over 950 years old because it was observed and recorded in the ancient. Chinese records, including the date (we know it"s birthday) Had 365 steps, showing an awareness of the sun"s annual cycle.
