The television|The tv} we {watch|view|observe|look at|enjoy|check out} {at home|at your home|in the home|in your own home|at your house|in your house}, the {weather|climate|weather conditions|temperature} updates we {receive|obtain|get|acquire}, the {knowledge|understanding|information|expertise|know-how|awareness} we {acquire|obtain|get|purchase|receive} of other planets {in the|within the|inside the|while in the|from the|during the} universe, are all {possible|feasible|achievable|attainable|doable|probable} {due|because of|owing|thanks} to satellites. {Artificial|Synthetic} satellites are man-made objects that orbit the Earth. These satellites are {launched|introduced|released} for {specific|particular|certain|distinct|precise|unique} {purposes|functions|reasons|needs|uses|applications}. A satellite is lifted {from the|in the|from your|through the|with the|within the} earth's {surface|surface area|floor|area} by a rocket and, {once|as soon as|when|after|the moment|at the time} {placed|positioned|put} in orbit, maintains its {motion|movement} {without|with out|without having|with no|devoid of|without the need of} {further|additional|more|even more|even further|further more} rocket propulsion. {The first|The very first|The initial|The primary|The 1st|The main} {artificial|synthetic} satellite, Sputnik I, was {launched|introduced|released} on Oct. {4|four}, 1957, {by the|from the|through the|with the|because of the|via the} USSR, which {triggered|induced|activated|brought on} the {space|area|room|place|house} race {between|in between|among|amongst|involving|concerning} the Soviet Union {and the|and also the|as well as the|along with the|plus the|as well as} U.S. {The first|The very first|The initial|The primary|The 1st|The main} U.S. satellite, Explorer I, was {launched|introduced|released} on Jan. 31, 1958. {During|Throughout|In the course of|For the duration of|Through|All through} {the first|the very first|the initial|the primary|the 1st|the main} {decade|10 years|ten years} of {space|area|room|place|house} exploration, satellites {were|had been|have been|ended up|were being} {launched|introduced|released} from {either|both|possibly} {the united states|the us|the usa|america} or USSR. {Today|These days|Right now|Nowadays|Currently|Now}, {there are|you will find|you'll find|you can find|you will discover|there are actually} {more than|greater than|over|a lot more than|in excess of|much more than} {three|3|a few} dozen {launch|start} {sites|websites|web sites|internet sites|web-sites|web pages} in use or {under|below|beneath|underneath|less than} {construction|building|development|design} {in more|in additional} {than a|than the usual} dozen {countries|nations|international locations|nations around the world}.