In your opinion, as a space engineer, how challenging is it to use a multitude of large flat flexible solar sheets as a "leaflet" lander for planetary exploration? Each sheet does not need a parachute and today's technology can easily provide video and other parameters from the surface of the planet at extremely low cost. It has been proposed before. I imagine 20 sheets thrown on Europa using simple carrier, which will dispense these sheets into the upper atmosphere and will eventually land. All you need is one successful sheet. The logic dictates that floating sheets can land in a wide area providing almost a global picture showing differences in surface chemical composition, weather and so on.
What is this?? I do not know about these leaflet landers but it does sound interesting. We are trying to microsize our spacecraft communications into smaller packages so this would be something in the future maybe!? I'll have to keep my ear open on this topic.