Question
What was discovered in 1965 and is believed to be leftover thermal energy from the big bang?
red shift
the Eagle Nebula
the Doppler effect
background radiation
red shift
the Eagle Nebula
the Doppler effect
background radiation
Answers
GPT-4o mini
The correct answer is **background radiation**. Specifically, this refers to the Cosmic Microwave Background (CMB) radiation, which was discovered in 1965 by Arno Penzias and Robert Wilson. It is considered to be the afterglow of the Big Bang and represents thermal energy left over from the early universe.