Question: how many times have the astros appeared in the world series

title: Houston Astros
text: The Astros played in the NL from 1962 to 2012 . They played in the West Division from 1969 to 1993 , and the Central Division from 1994 to 2012 . While a member of the NL , the Astros played in one World Series , in 2005 , against the Chicago White Sox , in which they were swept in four games . 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 . They subsequently won the 2017 World Series against the Los Angeles Dodgers , winning four games to three , earning the team , and Texas , its first World Series title . 

Answer: answer: The Astros played in one World Series, in 2005, against the Chicago White Sox, in which they were swept in four games.  They subsequently won the 2017 World Series against the Los Angeles Dodgers, winning four games to three.