The experimental evidence from DASI confirms theorists' predictions that space is not curved, that ordinary matter makes up only four percent of the universe, and that the Big Bang was immediately followed by a fraction of a second's worth of the most expansion the universe has ever seen. That expansion is called cosmic inflation. At that point, cosmologists think the universe consisted of a very hot collection of protons and neutrons with electrons unattached because their energy was tied up in photons. As the universe cooled, some of it was compressed while some of it expanded. These differences show up as temperature variations in the microwave background and correspond to the composition of the universe.
Gravity increases the fluctuations.
This has resulted in the formation of galaxies, planets, and black holes. The growth spurt of inflation magnified the uncertainty and irregularity in the subatomic world by rapidly expanding the particles by a factor of 1030. This has resulted in very slight variations in the distribution of matter and temperature in the universe. DASI has allowed scientists to measure the temperature variations and provide experimental evidence confirming the theory of inflation. The data shows temperature variations that form harmonic peaks, which in Carlstrom's analogy are like musical overtones.