How to Say "star system" in Spanish
The Spanish word for “star system” is “galaxia” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
general term

Examples
Nuestra galaxia se llama la Vía Láctea.
Our galaxy is called the Milky Way.
El telescopio Hubble puede ver galaxias muy lejanas.
The Hubble telescope can see very distant galaxies.
Se cree que hay miles de millones de galaxias en el universo.
It is believed that there are billions of galaxies in the universe.
Gender Rule
Even though it ends in '-a', like many Spanish words, remember that 'galaxia' is a feminine noun, so you always use 'la' or 'una' with it.
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