Mrs Welsh very happy. Her garden is clean. Alex has raked the leaves in her garden. She is happy because her house is clean, too. The twins Jay and Jane have cleaned up the house. Mrs Welsh is happy. Her flowers are beautiful. Helen has watered the flowers. Mr Elson is happy. There is a lit of food in the fridge. Ron has done the shopping. Mr Davis is happy because the path in his garden are clean. Alex has swept the paths. The children in the hospital are happy. They have a lot of new toys. Helen and Ann have sewn soft toys for them.
Space exploration — the discovery and exploration of outer space using space technology. Physical exploration of space conducted both with manned space flight and unmanned spacecraft. Technical study of the cosmos preceded the development of astronomy and the creation of large and relatively efficient rockets in the early twentieth century. Space exploration was one area of rivalry between the USSR and the USA in the cold war. The beginning of the era of space exploration can be considered the launch of the first artificial Earth satellite — Sputnik 1 launched by Soviet Union on 4 October 1957. The Soviet space program was at the forefront.
