Not sure what these "gallons" thingies you mention are. NASA, ESA, CSA all use metric. The JWST will carry 240 litres of hydrazine fuel and dinitrogen tetroxide oxidizer.
Not sure what these "gallons" thingies you mention are. NASA, ESA, CSA all use metric. The JWST will carry 240 litres of hydrazine fuel and dinitrogen tetroxide oxidizer.