Aerogel

A new material developed by JPL/NASA with amazing insulating properties and a ghostly appearance like an hologram, even though it is very solid.

Aerogel will be used on the STARDUST spacecraft to capture comet particles from Comet Wild 2.

Check out the pictures in the link below.

• http://stardust.jpl.nasa.gov/photo/aerogel.html

It is 99.8% Air

Provides 39 times more insulating than the best fiberglass insulation

Is 1,000 times less dense than glass

Was used on the Mars Pathfinder rover

http://stardust.jpl.nasa.gov/tech/aerogel.html