When scientists need longer exposure times in high altitudes, they use scientific balloons like the one pictured here. Made of a super-thin polyethylene, the balloons are filled with inert helium and can be launched from almost anywhere, staying aloft for as long as 24 hours, 26 miles above the surface.
When scientists need longer exposure times in high altitudes, they use scientific balloons like the one pictured here. Made of a super-thin polyethylene, the balloons are filled with inert helium and can be launched from almost anywhere, staying aloft for as long as 24 hours, 26 miles above the surface.Image Credit: NASA