Задание

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A history of animals in space

Animals 19.___________(USE) repeatedly in the early days of the space race. The first hominid in space was Ham, a chimpanzee who 20.___________(TAKE) a suborbital flight in 1961. But very few non-human animals have made it as far as the Moon. In 1968, the Soviet Zond 5 mission transported two tortoises and some fruit fly eggs on a voyage that circled the Moon and returned safely to Earth. Four years later, five 21.___________(MOUSE) circled the Moon 72 times on the US Apollo 17 mission.

As the space race progressed, animals participated less. This is because the main purpose of using them was to establish whether spaceflight would be safe for humans in future missions.

Formation of a supernova

A supernova is an explosion of a massive supergiant star at the last stage of 22.___________(IT) life. Over a long period of time, a star builds up a core of iron. This 23.___________(RESULT) in an implosion that rapidly reheats the star and restarts the process of fusion. Now out of control, the star explodes with a huge amount of energy shining 24.___________(BRIGHT) than other stars and scattering debris in all directions, over vast distances.

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