Revolutionary rocket propellant and constant acceleration propulsion device for interplanetary and interstellar travel are just some of our inventions that will shape the future. Our team has successfully synthesized a new propellant oxidizer, stable triplet allotropic modification of oxygen, tetraoxygen, with a boiling point of 43C and specific impulse with kerosene of up to 4250 m/s. Patent pending. The nonzero viscosity of the space-time continuum and its sufficiently high density make it possible to use it as a support medium for spacecraft acceleration. We propose to capture a certain volume of the space-time continuum accelerate it and eject it in a certain direction. Since the space-time continuum has a distributed mass, according to the law of conservation of momentum, the spacecraft will also receive acceleration. Thus, the use of a space-time continuum as a working medium will create thrust. Since the space-time continuum permeates the Universe and its reserves are unlimited, it is possible to use it as a working medium for constant acceleration movement for as long as the electric power source is available. Nuclear reactor can serve as the source of energy. If the manned spacecraft can continuously maintain a comfortable acceleration of 1g for the crew, then it will reach the orbit of Mars in 1 week or less, to the orbit of Jupiter in 2 weeks, to the orbit of Saturn in 3 weeks. It will be possible to fly to the borders of the solar system in 3 months. The mass of the ship with a crew of 3 is tentatively estimated at 500-600 tons. It would require about 500 MW of electric power that can be provided by the nuclear reactor. Such a spacecraft will generate enough thrust to take off from the Earth's surface.