Because the theory fits all the evidence so far. There are still difficulties with it and more questions need to be answered but it seems to be the best theory at present.
The concept of what existed before the universe began is a topic of debate among scientists and philosophers. Some theories suggest that there was nothing before the universe began, while others propose the existence of a multiverse or other dimensions. Ultimately, the question remains unanswered and is a subject of ongoing research and speculation.
The concept of time having a beginning is a topic of debate among scientists and philosophers. Some believe that time began with the Big Bang, while others argue that time may have existed before the universe as we know it. The question of whether time has a beginning is still a subject of ongoing research and discussion in the scientific community.
Many scientists accept the Big Bang theory as the explanation for the origin of the universe. This theory proposes that the universe began as a singularity approximately 13.8 billion years ago, and has been expanding ever since. The evidence for the Big Bang includes the cosmic microwave background radiation and the observed redshift of distant galaxies.
The theory that the universe began with all matter and energy concentrated in a very small object is called the Big Bang theory. According to this theory, the universe expanded rapidly from a hot, dense state approximately 13.8 billion years ago.
The concept of time is a fundamental aspect of the universe, but its origins are still a topic of debate among scientists and philosophers. One theory is that time began with the Big Bang, the event that created the universe around 13.8 billion years ago. Another theory suggests that time is a fundamental aspect of the universe that has always existed. Some theories propose that time is a human construct and does not have a true beginning. Overall, the origins of time remain a complex and unresolved question in the fields of physics and philosophy.
Astronomers believe the universe began with an explosion, known as the Big Bang, because of the observed expansion of the universe, the cosmic microwave background radiation, and the abundance of light elements like hydrogen and helium. These pieces of evidence support the idea that the universe started from an incredibly hot and dense state about 13.8 billion years ago.
The Big Bang
The big bang began the expansion of spacetime with great rapidity. The Universe began with the Big Bang. In other words both space and time began at the big bang. The big bang started the Universe from the point t=0.
That is, more or less, the description of the Big Bang.
The Big Bang theory suggests that the universe began expanding from a very high-density and high-temperature state, but it was not an explosion in the traditional sense. It was a rapid expansion of space itself, not an explosion within preexisting space.
big bang: This is the big bang theory
actually it all started at a explosion called the big bang first the universe was stuck inside the explosion untill the universe began to expand inside this explosion pushing and making this explosion expand, finally when the explosion exploded the universe was formed
The theory that states the universe began in a violent explosion is the Big Bang theory. It proposes that the universe started as a singularity and has been expanding ever since, leading to the formation of galaxies, stars, and planets. This explosion occurred approximately 13.8 billion years ago.
No. The origin of the Universe is believed to have been very HOT, not cold.
The big bang theory which is a theory of cosmology holding that the expansion of the universe began with a gigantic explosion between 12 and 20 billion years ago
Scientists refer to the event that started the universe as the Big Bang. This is a cosmological model that suggests the universe began as a very hot, dense state and has been expanding and cooling ever since.
The concept of what existed before the universe began is a topic of debate among scientists and philosophers. Some theories suggest that there was nothing before the universe began, while others propose the existence of a multiverse or other dimensions. Ultimately, the question remains unanswered and is a subject of ongoing research and speculation.