1 Sputnik 1, the first artificial satellite to go into orbit, launched 4 October 1957. 2  Sputnik 2, the first spacecraft to carry a living animal (the dog Laika), launched 3 November 1957.  Sputnik 3, a research satellite launched 15 May 1958.
By population the 3 largest cities in Spain are Madrid 2.9 million, Barcelona 1.5 million, and Valencia 741,000. They include: the capital Madrid, Barcelona and Valencia. Onlyâ¦ two  of Spain's cities, the national capital Madrid and Barcelona, have  populations of more than one million.
Barcelona is Spain s second largest city, and capital of Catalonia. Barcelona property is found in a truly modern city, and in one of the world s leading cities in terms of economic power, cultural influence and tourist revenues.arcelona property at Montjuic in the southeast of the city offers views over the harbour and is topped with the spectacular 17th century Montjuic castle, which is now a museum.