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.
Madrid (/mÉËdrÉªd/, Spanish: [maËÃ°É¾iÃ°], locally: [maËÃ°É¾i(Î¸)]) is the capital city of the Kingdom of Spain and the largest municipality in both the Community of Madrid and Spain as a whole. The city has a population of almost 3.2 million with a metropolitan area population of approximately 6.5 million.