* Our Solar System: Planets like Mars, Venus, and Jupiter are all part of our solar system, which means they orbit our Sun.
* Stars: Stars are massive balls of hot gas that are incredibly far away. The closest star to our Sun is Proxima Centauri, which is about 4.24 light-years away.
* Light Years: A light-year is the distance light travels in one year. Light travels at an incredible speed (approximately 186,000 miles per second), so a light-year is a vast distance.
To put it into perspective, the distance between the Earth and the Sun is about 93 million miles, while the distance between the Earth and Proxima Centauri is about 25 trillion miles!
