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. El Prat De Llobregat Airport (BCN). History echoes through this town that ambles along a hilly perch beside the sea, like a necklace that gleams in the Mediterranean sun. The second largest city in Spain, it's located in the heart of the Catalonia region.