What is our location relative to the Big Bang?

Think about the big bang. Once you get through all the possible trajectories of the universe and you can get them back in time, they will eventually come together. "Merging trajectory" is a big bang and all objects, virtually all objects are in the same position. So, the universe that can be regarded as the position of the big bang has no meaning.

More quantitatively, the FLRW metric, which is a way to represent the entire universe in general relativity, includes the scale factor $ a $. This characterizes the relative proportion of the universe at different times. Specifically, the distance between two objects between $ t - 1 $ and $ t - 2 $ at different times (only by changing the scale) is satisfied.

Now, as time goes by, $ a $ is getting bigger. However, imagining the expansion of the universe running in the opposite direction, when $ a = 0 $, eventually all the objects are in the same position will return to "time". That is a big bang. (Quoted from another answer)

The success of the big bang nuclear synthesis and the discovery of the microwave background in 1964 confirmed the big bang. The Big Bang model depends on Albert Einstein's general theory of relativity and two theoretical pillars of cosmology. Cosmologists recently established the Λ CDM model of the evolution of the universe, including cosmic expansion, dark energy, dark matter. In the next decade there will be many possibilities and discoveries in the new data of the Fermi Gamma Ray Space Telescope and many existing cosmological models will be modified or clarified. In particular, huge discoveries surrounding dark matter may be discovered over the next few years. Fermi will be looking for evidence that dark matter is made up of giant particles interacting weakly and complements similar experiments with large hadron colliders and other underground detectors.

You may have heard this theory in Big Bang theory, Big Bang theory. Big Bang theory is one of the most accepted models in our universe. This model estimates the origin of the universe about 13.8 billion years ago. The model, at the beginning of all of these, shows that our little universe is very hot and dense. However, it is expanding rapidly. After our universe expanded rapidly, the first atom was formed. - Between the 16th and 17th centuries, an era generally called the scientific revolution was born. This opens the way to long-standing progress in past knowledge in the fields of chemistry, physics and biology. On the other hand, the revolution occurred in the 1950s, which led to the advancement of human science. To make these improvements, humans began paying attention to scientific theory. Before you continue, you need to define terms

The Big Bang model is mature in cosmology, but there is a possibility of improvement. The Big Bang theory based on the classical general relativity equation shows the singularity of the origin of space time; this infinite energy density is considered impossible in physics. Nevertheless it is well known that these equations can not be applied until the universe cools down to Planck 's temperature, and this conclusion depends on various assumptions, and some of them never experimentally I can not make sure. (See also Planck Age)