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 city, along with several smaller surrounding settlements, is the center of a large and very busy urban agglomeration on the coast of the Caribbean Sea. 7. Madrid, Spain. Madrid is a relatively smaller city than some of its âcousinsâ in Latin America. However, it is the largest Spanish-speaking city in the world outside of the Americas. According to Eurostat data, the population of the metropolitan area of Madrid is about 6,369,162. 8.