Atheism, as a broad term, refers to the lack of belief in gods or deities. It is not a unified belief system or a philosophy, so the views and opinions of atheists can vary greatly on different topics, including the Big Bang.
The Big Bang theory is a scientific explanation for the origin of the universe based on extensive observational and theoretical evidence. It proposes that the universe originated from an extremely hot and dense state approximately 13.8 billion years ago and has been expanding ever since. The theory is supported by a wide range of scientific observations, such as the cosmic microwave background radiation and the observed redshift of galaxies.
While many atheists accept and appreciate scientific explanations, including the Big Bang theory, it's important to note that not all atheists are scientists or have expertise in cosmology. Atheists, like any other group of people, can have varying levels of knowledge and interest in scientific theories. Some may have a good understanding of the scientific evidence and accept the Big Bang theory based on that, while others may simply trust the consensus of the scientific community without delving into the details.
However, it's worth noting that atheism itself does not provide a specific explanation for the origin of the universe. It is primarily a position on the existence of gods or deities, and individuals may hold diverse views on cosmological theories, including the Big Bang, regardless of their atheistic beliefs.