Which is evidence of universe expansion that supports the Big Bang Theory?
The temperature of the universe has cooled and warmed repeatedly over time. The temperature of the universe has cooled and warmed repeatedly over time. The temperature of the universe has cooled over time. The temperature of the universe has cooled over time. The temperature of the universe has warmed over time. The temperature of the universe has warmed over time. The temperature of the universe is the same as it was at the time of the Big Bang.
The evidence of the universe expansion that supports the Big Bang Theory is that the temperature of the universe has cooled over time.
One piece of evidence that supports the Big Bang Theory and the expansion of the universe is the observation that the temperature of the universe has cooled over time. According to the theory, as the universe expands, its energy is spread out and diluted, causing the temperature to decrease. This cooling can be observed through measurements of the cosmic microwave background radiation, which is a remnant of the hot and dense early universe. The observed decrease in temperature over time aligns with the predictions of the Big Bang Theory.
The evidence of universe expansion that supports the Big Bang Theory is the fact that the temperature of the universe has cooled over time. This is known as cosmic microwave background radiation.
To understand how scientists came to this conclusion, we need to go back to the early stages of the universe. According to the Big Bang Theory, the universe began as a hot and dense singularity, and it has been expanding ever since. As the universe expanded, it also cooled down.
The first direct evidence of this cooling came in the 1960s with the discovery of cosmic microwave background radiation (CMB). This radiation is a faint glow that fills the entire universe. It was first detected by the Penzias and Wilson in 1965, and later confirmed by the COBE (Cosmic Background Explorer) satellite in 1992.
The cosmic microwave background radiation is essentially the afterglow of the Big Bang. When the universe was very young, it was filled with a hot plasma of particles and energy. As the universe expanded and cooled down, this plasma gradually cooled to form neutral atoms, and light was able to travel freely through space. This light, emitted at the time of recombination, has been stretched and shifted towards longer wavelengths over billions of years due to the expansion of the universe, giving us the observed cosmic microwave background radiation.
By studying the characteristics of this radiation, such as its temperature and distribution, scientists have been able to gather evidence in support of the Big Bang Theory. The fact that the temperature of this radiation is around 2.7 Kelvin today (close to absolute zero) indicates that the universe has indeed cooled over time.
So, the correct answer is: "The temperature of the universe has cooled over time."