student asking question

Why did they call Buzz an "Astro boy"? and why is the Astro boy" start with capital A?

teacher

Native speaker’s answer

Rebecca

They call Buzz Lightyear "Astro boy" here because they don't know his real name so they use this as a nickname. Buzz Lightyear is from outer space, so they give him the nickname "Astro boy" because "astro" means "star" and is put into a lot of words related to outer space and the stars. "Astro" is capitalized because it is said as a name and thus must be capitalized.

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