The Big Bang is one of the most widely known and debated theories in cosmology.
Most theorists assume the explosion was hot, and that the universe has since cooled dramatically.
Today, the background radiation is only 2.7 deg. Kelvin, but theoretically the farther back in time we look, the hotter the CMBR should be. They found that back then the cosmos was between 6 and 14 deg. By examining at the object's spectrum, the astronomers found the signatures of carbon and hydrogen that only occur at these specific temperatures. Their result is in line with other theorists who predicted that the CMBR should be 9.7 deg.