How to Say “Extraterrestrial” in Spanish: A Comprehensive Guide

Welcome to our comprehensive guide on how to say “extraterrestrial” in Spanish! Whether you are interested in formal or informal contexts, we’ve got you covered. In this article, we will explore various ways to express this concept in Spanish, provide tips and examples, and highlight regional variations when necessary. Let’s dive right in!

Formal Ways to Say “Extraterrestrial” in Spanish

When speaking formally, you might want to use sophisticated and precise terms to convey the idea of “extraterrestrial.” Here are a few suitable options:

1. Alienígena

The most common and widely accepted term for “extraterrestrial” in Spanish is “alienígena.” Whether referring to beings, objects, or concepts from other planets or galaxies, this word covers it all. For example:

El avistamiento de un objeto alienígena causó gran expectación en la comunidad científica. (The sighting of an extraterrestrial object caused great excitement in the scientific community.)

2. Ser de otro planeta

Another formal way to express “extraterrestrial” is the phrase “ser de otro planeta,” which literally means “to be from another planet.” This can be used both metaphorically and literally. Consider the following example:

Sus habilidades matemáticas son tan extraordinarias que parecen ser de otro planeta. (His mathematical skills are so extraordinary that they seem to be from another planet.)

Informal Ways to Say “Extraterrestrial” in Spanish

If you’re looking for a more casual or colloquial way to talk about extraterrestrial matters, the options below might suit your needs:

1. Extraterrestre

The term “extraterrestre” works in both formal and informal contexts, making it versatile. It is widely recognized and used in everyday conversations. Take a look at this example:

Anoche vi una película sobre extraterrestres muy emocionante. (Last night I watched a very exciting movie about extraterrestrials.)

2. Marciano/a

A more informal and playful term for “extraterrestrial” is “marciano” for males and “marciana” for females. This word, inspired by the popular image of Martians, is common among younger generations. Consider this example:

¡Ese chico es tan raro! Parece un marciano. (That guy is so weird! He looks like an extraterrestrial.)

Regional Variations

While the aforementioned terms are widely used throughout the Spanish-speaking world, it’s important to note that some regional variations may exist. Let’s take a quick look at a few of these variations:

1. Ser de otro mundo

In some regions, particularly in Latin America, the expression “ser de otro mundo” (to be from another world) might also be used to refer to “extraterrestrial” matters. This phrase is more figurative and can be used in both formal and informal speech. Here’s an example:

¡La tecnología de ese celular es de otro mundo! (The technology on that cellphone is out of this world!)

2. Ser de otro sistema solar

In certain contexts, especially in scientific or speculative discussions, you may encounter the expression “ser de otro sistema solar” (to be from another solar system). This term emphasizes the concept of being beyond our own solar system. For instance:

En la película, los personajes viajan al espacio y descubren seres de otro sistema solar. (In the movie, the characters travel to space and encounter beings from another solar system.)

Tips for Using the Terms Correctly

To ensure you use these terms accurately, here are a few essential tips to keep in mind:

  • Pay attention to gender: Remember to match the gender of the term, such as using “alienígena” for masculine nouns and “alienígena” or “alienígena” for feminine ones.
  • Consider the context: Different terms may be more appropriate depending on the context, so choose the option that best fits the situation.
  • Keep it casual or formal: Choose between formal or informal language based on the setting and the relationship you have with the person you’re speaking to.
  • Learn regional variations: If you’re planning to travel or interact with Spanish speakers from specific regions, familiarize yourself with their preferred terms for “extraterrestrial.”


Congratulations! You are now equipped with a wide range of options for expressing the concept of “extraterrestrial” in Spanish. Whether you are in formal settings, engaging in casual conversations, or exploring regional variations, you are ready to confidently communicate. Remember to consider the context, respect gender agreement, and adapt your language to match the situation. Enjoy expanding your Spanish vocabulary and continue exploring the fascinating world of language!

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