In the American dub of the 1980's series, you see the year "2030" display - and this actually makes sense because Tezuka was - at that point - "updating" the series.
When he first created Atom, the story was set 50 years into the future: 2003. So, 50 years forward from 1980 is 2030.
As for Astro growing up / adult body / aging . . . I guess I'm one of the only one's here who thinks it is utterly LOGICAL Astro would WANT to mature along with his human friends.
Think about it:
His
intelligence isn't "frozen" at a 9-year-old level
He's made emotional, "human" bonds with people his own age -
they are going to be growing up, both intellectually and emotionally as well as physically - and what is Astro going to do? Remain emotionally repressed?
I don't think so!
Tenma intended he would grow up. So even if he body "failed" in this function, it doesn't mean his MIND would remain childish.
Does he remain in 4th grade for his entire life? That simply doesn't make sense.
Does he become an adult in child's body?
Now THAT seems creepier to me than an adult version of Astro Boy.
I do agree that having a child with Astro's power, morals and wisdom is incredibly appealing, but I personally have always felt he would be just as special as an adult or "old man."
(And yes, I think Astro as a man is HOT 'cause you can still see "little Astro" in his face/eyes). I think the "creepy" factor is because he looks more "naked" as a grown guy with "superhero muscles." So we just need to give him a new "uniform" - I don't think he'd object!
But, 'cmon . . . in a suit??

Yup, I think he's perfect at any age!!

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