Theoretically speaking, I suppose all seven of these planets could be terraformed? Some of them will obviously be easier to terraform than others, though.
For the inner three planets, you might be able to cover the hot sun-facing sides in solar panels and then build settlements on the more hospitable dark side.
(I'm talking about human settlements here; obviously vec/toulh settlements would have different temperature requirements.)
For the inner three planets, you might be able to cover the hot sun-facing sides in solar panels and then build settlements on the more hospitable dark side.
(I'm talking about human settlements here; obviously vec/toulh settlements would have different temperature requirements.)