How big is the universe?
While the entire size of the universe is unknown, scientists have estimated that the universe is approximately 93 billion light-years in diameter.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: How big is the universe?
### Input: 
### Response: While the entire size of the universe is unknown, scientists have estimated that the universe is approximately 93 billion light-years in diameter.