The official wiki contains the following bit of advice regarding meteors:
Note that if you have built a single-block bridge in the sky in search of Floating Islands it is possible for a meteorite to land on that bridge and you will end up getting only a small amount of Meteorite. It is suggested to destroy any paths in the sky before smashing a Shadow Orb in order to get a normal amount of Meteorite.
As it happens, I went searching for floating islands using bridges made of wood platforms. (No, I have no idea why I did that. Bridges you can fall through seem less useful than the usual kind.) I just smashed a shadow orb and am now wondering whether I need to rush to destroy my bridge before the meteor arrives.
So, can meteors land on wood platforms? I see three possible outcomes:
- The meteor ignores the platform (as does water) and lands on the terrain below.
- The meteor impacts the platform, partially replacing it with Meteorite.
- The meteor impacts the platform, but as it is not "solid", no Meteorite is created.