The Houston Astros are an American professional baseball team based in Houston, Texas. The Astros compete in Major League Baseball as a member club of the American League West division, having moved to the division in 2013 after spending their first 51 seasons in the National League. 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 as an expansion team in 1962 along with the New York Mets. The current name—reflecting Houston's role as the control center of the U.S. crewed space program—was adopted three years later, when they moved into the Astrodome, the first domed sports stadium. The Astros played in the NL from 1962 to 2012, first in the West Division from 1969 to 1993, followed by the Central Division from 1994 to 2012. The team was reclassified to the American League West from 2013 onward. While a member of the NL, the Astros played in one World Series in 2005, losing in four games to the Chicago White Sox. In 2017, they became the first franchise in MLB history to have won a pennant in both the NL and the AL, when they defeated the New York Yankees in the ALCS.