Classify this sentence in terms of academic reading difficulty.
Supernovas are exploding stars that shine brighter than a galaxy.
Based on the given sentence, the academic reading difficulty can be classified as "easy". The sentence structure is simple, the vocabulary used is not advanced, and the information presented is basic and easy to understand.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify this sentence in terms of academic reading difficulty.

### Input:
Supernovas are exploding stars that shine brighter than a galaxy.

### Output:
Based on the given sentence, the academic reading difficulty can be classified as "easy". The sentence structure is simple, the vocabulary used is not advanced, and the information presented is basic and easy to understand.