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Questions and Answers
According to the Big Bang theory, when did space and time emerge together?
According to the Big Bang theory, when did space and time emerge together?
- 1 billion years ago
- 100 million years ago
- 13.787±0.020 billion years ago (correct)
- 10 billion years ago
What is the approximate diameter of the observable universe at the present day?
What is the approximate diameter of the observable universe at the present day?
- 10 billion light-years
- 100 million light-years
- 1 billion light-years
- 93 billion light-years (correct)
Who developed the heliocentric model with the Sun at the center of the Solar System?
Who developed the heliocentric model with the Sun at the center of the Solar System?
- Indian philosophers
- Isaac Newton
- Nicolaus Copernicus (correct)
- Ancient Greek philosophers
What did Isaac Newton build upon in developing the law of universal gravitation?
What did Isaac Newton build upon in developing the law of universal gravitation?
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What were some of the earliest cosmological models of the universe like?
What were some of the earliest cosmological models of the universe like?
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Study Notes
The Big Bang Theory
- Space and time emerged together approximately 13.8 billion years ago.
The Universe
- The observable universe has an approximate diameter of 93 billion light-years at the present day.
Heliocentric Model
- The heliocentric model, with the Sun at the center of the Solar System, was developed by Nicolaus Copernicus.
Law of Universal Gravitation
- Isaac Newton built upon the work of Galileo Galilei and Johannes Kepler in developing the law of universal gravitation.
Early Cosmological Models
- Some of the earliest cosmological models of the universe were geocentric, placing Earth at the center of the universe.
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