cosmic microwave background

Science

What is cosmic microwave background?

Heat that remains after Big Bang, event that created our universe is known as Cosmic Microwave Background (CMB). Universe rapidly expanded and cooled at beginning. CMB is remnant heat or radiation from Big Bang. We can’t see CMB with our eyes because it is very cold—only 2.725 degrees above absolute zero, which is -459.67 degrees Fahrenheit or -273.15 degrees Celsius.…