Sal makes a relatable comparison for pupils to understand the universe's relative size. The progression from a man's size to a galaxy's size is explained in terms of each object relative to the next. The multiple objects we can process realistically help determine the size and distances we can imagine in space and the universe.

Concepts

stars, the earth, the sun, skyscrapers

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Additional Tags

truck, skyscraper, earth, sun, star, science

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Classroom Considerations

• This video is hosted on YouTube