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Aerogel, i think.

It may be hydrogen.

What else can I help you with?

Related Questions

Where does most of our knowledge about the earth come from?

Name the layers of earth in order from most dense to least dense


Do the most dense things float or sink?

The density of an object determines if it sinks or floats. If an object is more dense than the medium it is in, it will sink. If it is less dense, it will float. Therefore, the most dense things typically sink.


What is the most dense planet?

Mercury has a density of 5.427 g/cm³ Earth has a density of 5.515 g/cm3 So Earth is the most dense planet. [See discussion for more information] NB: Mercury is the most dense planet in our solar system when not accounting for gravitational compression.


What is the most dense subtance on earth?

Osmium


Is Earth the least dense of all planets?

No. In fact it is the most dense planet. The least dense is Saturn.


Is the earth dense than the sun?

Overall yes, much of the sun's volume is gaseous material which is much lighter than the rock and metal that the earth is composed of. The density of Earth is 5.56 g/cm3 whereas the sun is 1.4 g/cm3 the earth is the most dense object in our Solar System (as far as we know)


Is the inner core the least dense layer of the earth?

The core is the most dense layer


Which atmospheric layer is dense?

The troposphere is the closest to the Earth and most dense atmospheric layer


What is the most dense wood on earth?

Black Ironwood


What is the most dense part of earth?

inner core


Is the Mantle has most dense or least dense layer of the earth?

It is neither. The densest layer is the inner core. The least dense layer is the crust.


What is the most dense planet in the solar system?

The Earth is the most dense planet in our solar system out of all eight planets.