The Universe is the vast expanse of space and all matter and energy within it. It includes all planets, stars, galaxies, and other celestial bodies.
The current estimate for the age of the Universe is around 13.8 billion years. This age is based on scientific evidence and the measurement of the cosmic microwave background radiation.
Dark matter is a type of matter that does not emit or absorb light, making it invisible to traditional telescopes. It is believed to make up about 85% of the matter in the Universe and plays a crucial role in the formation and structure of galaxies. Dark energy, on the other hand, is a mysterious force that is believed to be responsible for the accelerated expansion of the Universe. Its exact nature and origin are still unknown.
It is estimated that there are around 2 trillion galaxies in the observable Universe. However, this number is constantly increasing as technology advances and our ability to observe further into the Universe improves.
The Big Bang Theory is the prevailing scientific explanation for the origin of the Universe. It suggests that the Universe began as a singularity, a point of infinite density and temperature, and has been expanding and cooling ever since. This theory is supported by various observations and evidence, such as the cosmic microwave background radiation and the abundance of light elements in the Universe.