* Light travels through the vacuum of space. Light is a form of electromagnetic radiation, which means it doesn't need a medium (like air or water) to travel. It can move through the vast emptiness of space.
* Sound needs a medium to travel. Sound is a vibration that travels through matter. It needs something to vibrate, like air, water, or even solids. In the vacuum of space, there's nothing for sound waves to vibrate, so they can't travel.
Think of it like this:
* Light: Imagine throwing a pebble into a pond. The ripples spread out across the water, even though the pebble isn't touching the water anymore. Light acts similarly, traveling through the universe without needing to touch anything.
* Sound: Imagine hitting a drum. The drum vibrates, making sound waves that travel through the air. If there was no air, the drum wouldn't make any sound.
In summary: Light can travel from distant stars to Earth because it doesn't need a medium, while sound cannot because it requires something to vibrate.
