The Moon is about 239,000 miles (382,400 km) from Earth. Imagine you could travel to the Moon by car. Driving day and night without stopping, at a speed of 55 mph, it would take you about 180 days to reach the Moon!
The Sun is 93,000,000 miles (150,000,000 km) from Earth. If you took a 747 jumbo jet, travelling at 600 mph nonstop, it would take you 17 years to get to the Sun!
The distance to stars is measured in "light years" (the distance that light can travel in one year). At the speed of light, you could go around the Earth over seven (7) times in a snap!
In astronomy, we often use very big numbers (e.g., 100 billion stars in the Milky Way Galaxy; 100 billion galaxies in the universe). The question is, how big are "big" numbers? For example, a person counting one number each second 24 hours a day will take 32 years to reach 1 billion; 32,000 years to 1 trillion, and 32 million years to 1 quadrillion!