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.
At first glance, Spainâs biggest port city appears to have little to offer, but visitors who take the time to peer underneath Bilbaoâs industrial faÃ§ade will find much to explore. The cityâs standout attraction is the Guggenheim Bilbao Museum, one of architect Frank Gehryâs most spectacular achievements.