1.   Antimatter, it turns out, is real, nonfiction stuff, but too rare to be used directly as rocket fuel.

2.   He says the residue is rocket fuel, but investigators say it actually is a glue used to bind airplane seats.

3.   On Earth, nitrogen is an important ingredient of both storable rocket fuels and oxidizers.

4.   Polar ice also would provide hydrogen for rocket fuel and for industrial processes.

5.   The real danger lies in unburnt rocket fuel that falls with the metal.

6.   Also a massive idle chemical works that used to make rocket fuel for Soviet ICBMs.

7.   Among the military wastes under consideration are rocket fuel, the chemical components of military munitions, explosives and chemical warfare agents.

8.   Among them is a device that would gather carbon dioxide from the Martian atmosphere and combine it with hydrogen to produce methane, a rocket fuel.

9.   And because unheated rocket fuel would freeze on Mars, the lander could stay there for only four days in one scenario.

10.   And if sufficient quantities of ice are discovered on the moon, as scientists hope, its constituent elements of hydrogen and oxygen could be converted into rocket fuel.