What-is-Cosmology-,.and its-Origin,.pptx

Cosmology the origin of the universe and different models of how the universe was made

1. What is Cosmology? Cosmology is the study of the origin, evolution, and structure of the universe. It explores the fundamental questions about the universe, such as its size, age, and composition. Cosmologists use a variety of tools and techniques, including observations, theories, and simulations, to investigate the universe. RH

2. Anaximander Born 610 B.C, Miletus—died 546/545 B.C, Greek philosopher, often called the founder of astronomy. He apparently wrote treatises on geography, astronomy, and cosmology that survived for several centuries and made a map of the known world. He was the first thinker to develop a cosmology.

3. Rigveda 1 Ancient Indian Text The Rigveda is a collection of ancient Indian hymns and prayers dating back to the Vedic period. 2 Cosmology in the Rigveda The Rigveda contains hymns and verses that refer to the creation of the universe, the role of gods, and the cosmic order. 3 Creation of the Universe The Rigveda describes the creation of the universe from a primordial chaos, with gods playing a role in shaping the cosmos.

4. The Hymn of Creation in the Rigveda The earliest musings about the origin of the universe can be found in the Rigveda, an ancient Indian collection of more than one Vedic Sankrit hymns composed in 1700-1100 B.C. The Hymn of Creation in the Rigveda (Rigveda 10:129) reveals that ancient Indians believed that the universe had an origin and pondered about how and where the world and everything else began.

5. Philolaus 1 Early Greek Philosopher Philolaus was a Pythagorean philosopher who lived in the 5th century BC. 2 Geocentric Model Philolaus proposed a geocentric model of the universe, with the Earth at the center. 3 Central Fire He placed a central fire at the center of the universe, with the Earth and other celestial bodies orbiting around it.

6. Aristarchus of Samos (310-230 B.C) Aristarchus of Samos was a Greek astronomer who lived in the 3rd century BC. He proposed a heliocentric model of the universe, placing the Sun at the center. He believed that the Earth revolved around the Sun, a revolutionary idea for his time.

7. Aristotle (384-322 B.C) Greek Philosopher Aristotle was a prominent Greek philosopher and scientist who lived in the 4th century BC. Geocentric Model Aristotle developed a geocentric model of the universe, placing the Earth at the center. Spherical Universe He believed that the universe was spherical and finite, with the Earth at its center.

8. Claudius Ptolemy (100-170 A.D) Roman Astronomer 2nd Century AD Ptolemaic Model Geocentric model that dominated astronomy for over 1400 years. Epicycles and Deferents Explained the motion of planets using complex geometric systems.