<|im_start|>user
How far away is Neptune from the Sun?<|im_end|>
<|im_start|>assistant
Neptune is an average distance of 2.8 billion miles (4.5 billion kilometers) away from the Sun, or 30 astronomical units away. One astronomical unit (AU) is the distance from the Sun to Earth. From this distance, it takes sunlight 4 hours to travel from the Sun to Neptune.<|im_end|>
