Whether you're watching a sci-fi movie, discussing the latest news from NASA, or simply stargazing on a clear night, knowing how to talk about space is a fantastic skill for any Spanish learner. This vocabulary set will equip you with the essential words to discuss everything from the planets in our solar system to the mysteries of the universe. It's a topic that fascinates people everywhere, making it a great way to start conversations and connect with native speakers. Many of these words will feel familiar, as they are direct cognates from Latin, sharing roots with their English counterparts (e.g., 'planeta', 'galaxia', 'telescopio'). This makes them relatively easy to remember. You'll notice that for scientific topics like astronomy, the vocabulary is highly standardized across the Spanish-speaking world, so you'll find very few differences between Spain and Latin America. This list focuses on the high-frequency words you'll actually hear and use. We've included example sentences that demonstrate how these words are used in natural, everyday contexts, helping you move beyond simple definitions and into real-world application.
sun
No me gusta salir al mediodía porque el sol es muy fuerte. — I don't like to go out at noon because the sun is very strong.
moon
Anoche había luna llena y el cielo estaba súper despejado. — Last night there was a full moon and the sky was super clear.
star
Cuando era niño, quería ser astrónomo para estudiar las estrellas. — When I was a kid, I wanted to be an astronomer to study the stars.
planet
Los científicos siguen buscando vida en otros planetas. — Scientists continue to search for life on other planets.
comet
El cometa Halley es visible desde la Tierra cada 76 años aproximadamente. — Halley's Comet is visible from Earth approximately every 76 years.
asteroid
Una película de ciencia ficción muy famosa trata sobre un asteroide que va a chocar con la Tierra. — A very famous science fiction movie is about an asteroid that is going to collide with Earth.
meteorite
En el museo de ciencias tienen un fragmento de meteorito que puedes tocar. — In the science museum, they have a meteorite fragment that you can touch.
universe
El universo es tan inmenso que es difícil de imaginar su tamaño. — The universe is so immense that it's difficult to imagine its size.
galaxy
Nuestra galaxia se llama la Vía Láctea. — Our galaxy is called the Milky Way.
solar system
En la escuela, aprendimos los nombres de todos los planetas del sistema solar. — At school, we learned the names of all the planets in the solar system.
nebula
Las fotos de las nebulosas que toma el telescopio Hubble son espectaculares. — The photos of nebulas that the Hubble telescope takes are spectacular.
black hole
Los agujeros negros son uno de los mayores misterios del universo. — Black holes are one of the biggest mysteries of the universe.
space (outer space)
Los astronautas flotan en el espacio debido a la falta de gravedad. — Astronauts float in space due to the lack of gravity.
astronaut
La primera astronauta de México viajó al espacio en 1985. — Mexico's first (female) astronaut traveled to space in 1985.
spaceship
La nave espacial tardará casi un año en llegar a Júpiter. — The spaceship will take almost a year to reach Jupiter.
rocket
Vimos el lanzamiento del cohete en vivo por internet. — We watched the rocket launch live on the internet.
satellite
Gracias a los satélites, tenemos GPS en nuestros celulares. — Thanks to satellites, we have GPS on our cell phones.
space station
Los astronautas pasan meses viviendo en la estación espacial. — Astronauts spend months living on the space station.
launch
El lanzamiento del nuevo satélite fue un éxito total. — The launch of the new satellite was a total success.
telescope
Me regalaron un telescopio para mi cumpleaños y ahora puedo ver los anillos de Saturno. — They gave me a telescope for my birthday and now I can see the rings of Saturn.
observatory
En Chile hay observatorios increíbles porque el cielo es muy claro. — In Chile, there are incredible observatories because the sky is very clear.
orbit
La Tierra completa su órbita alrededor del Sol en 365 días. — The Earth completes its orbit around the Sun in 365 days.
gravity
Si no hubiera gravedad, todos estaríamos flotando. — If there were no gravity, we would all be floating.
eclipse
Nunca debes mirar un eclipse solar directamente sin protección. — You should never look at a solar eclipse directly without protection.
light-year
La estrella más cercana está a más de cuatro años luz de distancia. — The nearest star is more than four light-years away.