Comets are like frozen snowballs that travel through space. When they get close to the sun, the ice inside them starts to melt and turn into gas, creating a glowing cloud around the comet. This cloud reflects sunlight, making the comet look super bright, especially when it's near Earth.
Examples
- Comet brightness increases like a flashlight turning on in the dark
- The ice turns into gas, making the comet shine
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