Utilizing the now well-developed science of rocketry, the modern exploration of space began in October, 1957 when the Soviet Union launched Sputnik 1. This tiny satellite orbited the earth for 57 days, providing information on radiation and other phenomena in the upper atmosphere. In less than a year, the United States had also launched a satellite, Explorer 1. This started the "space race", years of competition between the U.S. and the U.S.S.R. to achieve new frontiers in space exploration. Space flight advanced rapidly from the simple sub-orbital flights of the 1950's, to manned missions to Earth's moon in the late 1960's. The rapid growth of space technology led to many practical applications, such as weather and surveillance satellites, and vastly improved worldwide communications. Today, although hindered by severe government budget cuts, the exploration of space continues. Plans in the near future call for continued orbital exploration via the space shuttle program, and the eventual construction of the multi-national, manned space station "Freedom" in the early 21st century.