Yes, the Big Bang theory is still widely accepted as the most widely supported explanation for the origin and evolution of the universe among scientists and cosmologists. It is the prevailing model that describes the early moments of the universe's existence.
According to the Big Bang theory, the universe began as a singularity—an extremely hot and dense point—in an event called the Big Bang approximately 13.8 billion years ago. From this incredibly dense state, the universe rapidly expanded and continues to expand to this day. The evidence supporting the Big Bang theory includes the observed cosmic microwave background radiation, the abundance of light elements in the universe, and the redshift of galaxies indicating their recession.
However, it's important to note that scientific theories are always subject to revision and refinement as new evidence emerges. The Big Bang theory itself has undergone several modifications over time, and there are still open questions and ongoing research in cosmology to better understand the early universe. Nonetheless, the Big Bang theory remains the leading explanation for the origins of the universe based on the available evidence.