Who was the first astronaut?
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
Who was the first astronaut?

### Response:

Yuri Gagarin, a Russian pilot, was the first person to travel into space. On April 12, 1961, he completed an orbit around the Earth in the Vostok 1 capsule. Gagarin famously said, "Our Earth is blue," while in Earth orbit.