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.
Spain Population Map (Spain Population:46505963,Spain Population Density:92.13/sq.km) Spain Population Map plots the cities locations with color intensity as per the city population in Spain. It also gives idea about Spain Population Density Map. Most Populated Cities Spain. The above Spain Population Map displays top ten populated cities of Spain.