What font did NASA use?

Inquiring minds want to know: What specific font did NASA, the National Aeronautics and Space Administration, opt for in their official documentation and publications? Did they choose a futuristic, sci-fi inspired typeface to reflect the cutting-edge nature of their space exploration missions? Or perhaps a more traditional serif font to maintain a sense of authority and reliability? Surely, with such a prestigious and groundbreaking organization, the choice of font must have been carefully considered. So, what font did NASA ultimately settle on to represent their brand and communicate with the world?