Origin of the Universe Theories
Long ago, people began to study the Universe. During Greek civilization, people developed two new ideas about universe including the geocentric view and the holocentric view.
The Geocentric View or Earth-Centered View
The geocentric view says the Earth is the center of everything. People thought Earth was like a still ball surrounded by a bubble around. It is known as the celestial sphere. They believed stars were in this bubble, moving around Earth each day. This idea was backed by Aristotle and Ptolemy.
The Holocentric View or Sun-Centered View
Long ago, a Greek philosopher Aristarchus suggested a sun-centered view called heliocentric view. It says the Sun is in the middle, and Earth moves around it. But at that time, not many agreed with this idea.
Origin of Universe : Big Bang theory & Current Cosmology
Origin of Universe: The story of how our universe began starts with a big event called the Big Bang theory. According to the Big Bang theory, everything began from a tiny and super hot point. From there, everything expanded fast by creating atoms. Most of the stuff in the universe is made of hydrogen, about 74% of it. This expansion has been happening for about 13.8 billion years, and now it seems like it is getting faster. However, some people disagree with the Big Bang theory.
They say it is based on the wrong idea that the universe is always expanding. They believe the universe is just staying the same which implies the early thoughts of Einstein. Later on, Einstein realized that the universe was getting bigger, but he had to change his theory to fit that idea. Our Solar System is a galaxy that is called the Milky Way. It has eight planets, including Earth, that go around the Sun. Besides the planets, there are also smaller things like asteroids, meteoroids, and comets flying around.
In this article, we are going to discuss the origin of the universe in detail. Let’s explore.
Table of Content
- Origin of Universe
- Origin of the Universe Theories
- How Old is the Universe?
- Big Bang Theory
- Importance of Big Bang Theory
- Current Cosmology
- Missions to Study Big Bang
- Will the Universe Expand Forever?