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Orbital spaceflight
Orbital spaceflight from Earth has only been achieved by launch vehicles that use rocket engines for propulsion. To reach orbit, the rocket must impart to the payload a delta-v of about 9.3–10 km/s. This figure is mainly (~7.8 km/s) for horizontal acceleration needed to reach orbital speed, but allows for atmospheric drag gravity losses (depending on burn time and details of the trajectory and launch vehicle), and gaining altitude. -
Laika
Laika is a universal hunting breed. When hunting fur—bearing animals, the husky is an indispensable assistant, although it also perfectly manifests itself in hunting large animals, distracting the animal's attention and indicating to the hunter in which direction the prey is. -
Belka and Strelka
Belka and Strelka are cosmonaut dogs who made a space flight on the Soviet spacecraft Sputnik—5 on August 19, 1960. The main purpose of the flight was to study the effect of space flight factors on the body of animals and other biological objects: overload, prolonged weightlessness, the transition from overload to weightlessness and vice versa, the study of the effect of cosmic radiation on animals and plant organisms, on the state of their vital activity and heredity.