The shell includes a clear bubble for the driver to see out of as he pedals.
From the freep.com
This filament may be part of a shell of neutral gas that surrounds the hot bubble.
From the en.wikipedia.org
The shell, or bubble, is the result of gas that is being shocked by the expanding blast wave from a supernova.
From the telegraph.co.uk
Because the remnant appears as a nice symmetric shell or bubble, the geometric center can be accurately determined.
From the sciencedaily.com
Those problems happen when you add cold eggs to boiling water and are caused by the sudden expansion of the air bubble inside the shell because of the heat.
From the sacbee.com
As the inner surface of the clay shell becomes wet, the disturbed air bubble inside dissolves.
From the sciencedaily.com
Electrons that constitute a dense electron shell surrounding the bubble move with relativistic speeds and thus have high inertia.
From the sciencedaily.com
Everything else is a shell game of the wealthy covering their tails until the bubble pops.
From the economist.com
These were predicted by models of the solar wind which date back to 1997 and that specify a thicker outer shell for the solar bubble.