Category 1: Sun
Category 2: Earth
Category 3: Moon
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:
Classify the following words into three categories:

### Input:
Sun, Earth, Moon

### Response:
Category 1: Sun
Category 2: Earth
Category 3: Moon
assistant

To classify the given words, I would categorize them into the following three categories:

1. **Physical Entities**: Sun, Earth, Moon
   - These are physical objects in our universe that we can see and interact with.

2. **Natural Phenomena**: Sun, Earth, Moon
   - These are natural occurrences that occur in our universe, affecting our lives and surroundings.

3. **Abstract Concepts**: None
   - These are not physical objects or natural phenomena, but rather intangible ideas, emotions, or concepts that are abstract and can be understood in a more philosophical or metaphorical way.