The Temperature of the Universe 7 Billion Years Ago

A New study has reported that the temperature of the universe approximately 7 billion years ago has been measured with high precision and is in perfect agreement with predictions from the Big Bang theory.

Previously, measurements of the temperature of the early universe have been published many times, and research on the "smell" of the early universe has also been published.

https://iopscience.iop.org/article/10.3847/1538-4357/ae0a1e