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.
The largest European metropolis on the Mediterranean coast and the second largest city in Spain â Barcelona is the capital of Catalonia. With a population of over 1.6 million, Barcelona is the second most populous city in Spain and the sixth most populated metropolitan area in Europe.It is located on the Mediterranean coast between the mouths of rivers Llobregat and Besosand besÃ²sand and is bounded by âThe serra Deâ collserola ridge to the. westith a population of over 1.6 million, Barcelona is the second most populous city in Spain and the sixth most populated metropolitan area in Europe. It is located on the Mediterranean coast between the mouths of rivers Llobregat and Besosand besÃ²sand and is bounded by âThe serra Deâ collserola ridge to the. west