Aerospace, aviation particularly, need, in any era, the strongest and most thermostable materials available, often at nearly any price. The space elevator, space ships (especially during atmospheric reentry), rocket combustion chambers, thermally challenged engine surfaces, hypersonic aircraft materials are better now than any available, with undreamed performance as the reward if obtained. As shown in this research, the offered new material allows to greatly improve all characteristics of space ships, rockets, engines, and aircraft, and design new types space, propulsion, and aviation systems. At present the term "nanotechnology" is well known-in its ideal form, the flawless and completely controlled design of conventional molecular matter from molecules or atoms. Such power over nature would offer routine achievement of remarkable properties in conventional matter, and creation of metamaterials where the structure not the composition brings forth new powers of matter. But even this yet unachieved goal is not the end in material science possibilities. The writer herein offers the idea of design of new forms of nuclear matter from nucleons (neutrons, protons), electrons, and other nuclear particles. He shows this new "AB Matter" has extraordinary properties (for example, tensile strength, stiffness, hardness, critical temperature, superconductivity, supertransparency, zero friction, etc.), which are up to millions of times better than corresponding properties of conventional molecular matter. He shows concepts of design for space ships, rockets, aircraft, sea ships, transportation, thermonuclear reactors, constructions, and so on from nuclear matter. These vehicles will have unbelievable possibilities (e.g., invisibility, ghostlike penetration through any walls and armor, protection from nuclear bomb explosions and any radiation flux, etc.). People may think this as fantasy. But 15 years ago most people and many scientists thought nanotechnology was fantasy. Now many groups and industrial laboratories, even start-ups, spend hundreds of millions of dollars for development of nanotechnological-range products (precise chemistry, patterned atoms, catalysts, metamaterials, etc.) and we have nanotubes (a new material which does not exist in nature) and other achievements are beginning to come out of the pipeline in prospect. Nanotubes are stronger than steel by a hundred times-surely an amazement to a 19th century observer if he could behold them. Nanotechnology, in near term prospect, operates with objects (molecules and atoms) having the size in nanometer (10(-9) m). The writer here outlines perhaps more distant operations with objects (nuclei) having the size in the femtometer range (10(-15) m, millions of times smaller than the nanometer scale). The name of this new technology is femtotechnology.