Two big changes for old Astronomy books :
1 there are planets around other stars, and
2 Pluto is not a planet
...My point is, the series isn't for us --though we'll be most eager to have it be stellar (pardon the pun) and hypercritical if it doesn't meet expectations. It's for some nine or ten-year-old who looks up at the sky sees Rigel, and says to themselves... "Wouldn't it be cool if...?"
Later!
--Coop
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