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.
In addition, 906,854 people in the most populated island of the archipelago and Spain. Two of the islands most important cities are located on: The capital Santa Cruz de Tenerife and San CristÃ³bal de La Laguna (World Heritage). San Cristobal de La Laguna, the second largest city of the island is home to the oldest university in the Canary Islands.