These early philosophers posed the broad questions that still underlie science: How did the world order emerge from chaos?What is the origin of multitude and variety in the world? What is the underlying relation between form and matter?The mass of observations they collected and their mathematical methods were important contributions to the later flowering of astronomy among the Greeks.The ) were responsible for one of the first Greek astronomical theories.As a result, Greek astronomers never regarded their geometric models as true or as being physical descriptions of the machinery of the heavens.They regarded them simply as tools for predicting planetary positions.
Astrophysics, the study of the physical properties of celestial bodies, arose during the 19th century and is closely connected with the determination of the chemical composition of those bodies.Chemists tend to be more interested in the specific properties of different elements and compounds, whereas physicists are concerned with general properties shared by all matter.( chemistry: The history of chemistry.)Astronomy is the science of the entire universe beyond Earth; it includes Earth’s gross physical properties, such as its mass and rotation, insofar as they interact with other bodies in the solar system.Greek philosophy answered these questions in terms that provided the framework for science for approximately 2,000 years.
calendar of 365 days, consisting of 12 months of 30 days each and five additional festival days at the end of each year.
Physical science, the systematic study of the inorganic world, as distinct from the study of the organic world, which is the province of biological science.