Use the excerpt from an online article to answer the question.
"While the big bang theory is the most popular modern theory of how the universe formed, it is incomplete."
Which question does the big bang theory leave unanswered?
• When did the universe form?
• What is the future of the universe?
• How did galaxies and stars form?
O What is the temperature of deep space?
1 answer
How did galaxies and stars form?
1 answer