The answer is ASTRO, five letters. It names one player from the Houston Astros, the city’s Major League Baseball team, and it is the standard fill for this clue. A plural clue wants ASTROS, and a clue marked briefly or informally wants STRO, from the nickname ‘Stros.
Colt .45s first, Astros from 1965
Houston joined the National League as an expansion team in 1962, and for its first three seasons the club was called the Colt .45s. On December 1, 1964, the team announced it would become the Astros, a name that reflected the city’s role in the American space program. The change came with a new home, the Astrodome, which held its opening day on April 9, 1965.
The Astrodome was the world’s first multipurpose domed sports stadium and was nicknamed the Eighth Wonder of the World when it opened. For a solver the point is simpler: the team, the stadium and the space connection all run through the same five letters, which is why so many different clues can be written to land on ASTRO.
The roof that renamed a lawn
The dome created a problem nobody had planned for. Its roof was made of clear panes, and players complained that the glare made fly balls hard to track, so two sections of panes were painted white soon after it opened. With less sunlight, the grass died. In 1966 the stadium installed ChemGrass, an artificial surface developed at Monsanto and patented in 1965, and after that well-publicized debut it was rebranded as AstroTurf, named after the stadium.
So a baseball stadium ended up naming a famous brand of artificial turf. It is also a reminder that ASTRO is not always a ballplayer. The prefix astro- means star or outer space, from Greek astron, star, and English has been building words with it since the middle of the 1700s.
The American League switch and older clues
The Astros spent their first fifty-one seasons in the National League, in the NL West from 1969 to 1993 and the NL Central from 1994 to 2012. A realignment moved them to the American League West in 2013. A puzzle written before then may call the team a National League side, and one written since may use American League wording, so an older clue is not wrong just because the league looks off. Both of the club’s World Series titles, in 2017 and 2022, came as an American League team.
Houston team entries by length
Not every Houston clue is about baseball, so read the sport word before you commit:
| Letters | Answer | Sport and wording |
|---|---|---|
| 4 | STRO | Baseball, clue says briefly or informally |
| 4 | AERO | Hockey, a former Houston team |
| 5 | ASTRO | Baseball, the default |
| 5 | STROS | Baseball, plural and informal |
| 5 | TEXAN | Football, the team since 2002 |
| 5 | OILER | Football, the team that left in 1997 |
| 6 | ASTROS | Baseball, plural clue |
| 6 | ROCKET | Basketball, hoopster or cager |
| 6 | DYNAMO | Soccer |
OILER belongs to older puzzles. The Oilers left for Tennessee in 1997, played two seasons as the Tennessee Oilers and became the Titans in 1999, so a Houston OILER clue is always about the past. TEXAN took over the city’s football slot when the Texans began play in 2002, and AERO covers the Aeros, a hockey club that moved to Des Moines, Iowa, in 2013 after 19 seasons in Houston.
Other ways a grid asks for ASTRO
Outside sports, ASTRO can also arrive as a dog. Astro is the Jetson family’s Great Dane in the animated series The Jetsons, and clues about George Jetson’s pet lead to the same five letters. Car clues can get there too: one recent puzzle asked for a van whose name includes a Houston baseballer, and the answer was CHEVROLETASTRO.
The word is also easy to build around. All five of its letters, A, S, T, R and O, are among the twelve most common letters in English, the same letters that filled the first two columns of a Linotype keyboard, which were arranged by frequency. Entries made of common letters cross easily, which helps explain why this one keeps coming back.
