# Rambo

/ˈɹæmboʊ/ (US) · CEFR C2 · Noun

Source: https://englishreference.com/word/rambo
Updated: 2026-08-15

## Definition

a small, faint moon that orbits the planet Jupiter. It was discovered in 2017 and is part of a group of moons that move in the opposite direction of the planet's rotation.

For teachers: a minor natural satellite of Jupiter, also designated as Jupiter LXVI. It belongs to the Ananke group of retrograde irregular satellites, characterized by its small diameter of approximately one kilometre.

## Examples

- Astronomers discovered the moon Rambo using a powerful telescope.
- The discovery of Rambo and other small Jovian moons suggests that many more tiny satellites remain undetected in the outer solar system.
- As a member of the Ananke group, Rambo likely originated from a larger asteroid that was captured by Jupiter's gravity and subsequently fragmented during a catastrophic collision.

## Usage notes

- When referring to the celestial body, it is treated as a proper noun and capitalized.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.