Re: Drag
"So, HOW BIG does that mirror need to be?"
Very, very big. But that is far from impractical, because the mirror can be made of plastic just a few molecules thick which is unfurled in space to be many square kilometres in area.
"So, HOW BIG does that mirror need to be?"
Very, very big. But that is far from impractical, because the mirror can be made of plastic just a few molecules thick which is unfurled in space to be many square kilometres in area.