The Houston Astros are an American professional baseball team located in Houston, Texas. The Astros are members of the American League (AL) West division in Major League Baseball (MLB), having moved to the division in 2013 after spending their first 51 seasons in the National League (NL). The Astros have played their home games at Minute Maid Park since 2000. The Astros were established as the Houston Colt .45s and entered the National League in 1962 with the expansion New York Mets. The current name was adopted three years later, when they moved into the Astrodome, the world's first domed sports stadium. The team's nickname reflects Houston's role as the center of the U.S. space program.