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 into three categories, I would group them as follows:

**Category 1: Celestial Bodies**
- Sun
- Earth
- Moon

**Category 2: Planets**
- None of the above, since Sun, Earth, and Moon are all planets in our solar system.

**Category 3: Natural Phenomena**
- None of the above, since Sun, Earth, and Moon are all natural phenomena that occur in our solar system.

The classifications are based on the fact that these words are names of celestial bodies and natural phenomena.