Results of the votes of the campaign “Give a name to an exoplanet”!

Results of the votes of the campaign “Give a name to an exoplanet”!


Nervia and Eburonia are the new official names of the star HD49674 and its exoplanet. This was decided by the 1300 participants in the Belgian vote, whose purpose was to determine the winning proposal among the four pre-selected name pairs. 

As part of its 100th anniversary, the International Astronomical Union launched the IAU100 NameExoWorls competition, which allowed every country in the world to name an exoplanet and its host star. In Belgium, individuals, associations and schools were invited to vote on a list of four proposals.

These four proposals (name of the star and name of the exoplanet) put to the vote were Nervia and Eburonia (74% of the votes), Saxophone and Tenor (10%), Diversity and Natura (9%), and Meuse and Escaut (7%).

The International Astronomical Union announced on December 17 in Paris that the star HD49674 and its exoplanet (attributed to Belgium as part of the international NameExoWorlds campaign) would henceforth bear the official names Nervia and Eburonia.

These names were proposed in a first phase of the campaign by Gatien de Callatay, Henry Ordutowski and Thomas Plancke. They are derived from “Nerviens” and “Eburons”, names of the most famous Celtic Belgae tribes that inhabited the northern part of Gaul. The Belgae gave their name to the Roman province of Gallia Belgica, and later to Belgium.


In recent years, astronomers have discovered thousands of planets and planetary systems orbiting around nearby stars. Some are small and rocky like the Earth, whilst others are gas giants like Jupiter. It is now believed that most stars in the Universe could have planets orbiting them and that some of them may have physical characteristics that resemble those of the Earth. The sheer number of stars in the Universe, each potentially with orbiting planets, along with the ubiquity of pre-biotic compounds, suggests that extraterrestrial life may be likely.

The IAU is the authority responsible for assigning official designations and names to celestial bodies. Within the framework of its 100th anniversary, the IAU launched the campaign IAU100 NameExoWorlds, allowing everyone to propose two names linked by a common theme to be attributed to an already known exoplanet and its host star. The purpose of this initiative is to raise awareness of our place in the Universe and to reflect on how the Earth could be perceived by a civilization from another planet.

Which exoplanet? Which star?

The IAU assigns to each participating nation one exoplanet and its host star. This selection was made by ensuring that the star is bright enough and well positioned in the sky so that it can be observed with a small telescope from across the country.

The star-exoplanet system selected for Belgium is the one to which the exoplanet HD 49674 b belongs. It is located more than 130 light years away from our solar system, in the Auriga constellation. This exoplanet, ten times lighter than Jupiter, was discovered in 2002. It orbits around a star similar to our Sun at a distance equivalent to 6% of the Earth-Sun distance.

The exoplanet assigned to Belgium:

ID Right ascension Declination Constellation Host star type
HD 49674 b 06h51m30.52s +40°52’03.9” Auriga Yellow Dwarf

How did the selection and voting take place?

Among the many proposals made by 15 August (nearly 700 pairs of names received), a list of four names was selected by the Belgian Committee among those that met the naming criteria (among others: not a name already assigned to an asteroid, no names of people living or deceased after 1919, need to have a name free of rights: therefore, no comic book heroes).
These four proposals were in a next step submitted to the vote until 13 November. The new names assigned to exoplanets will be used in conjunction with the existing scientific nomenclature, with mention of the persons who proposed them.

More information about the IAU

The IAU is the international astronomical organisation that brings together more than 13 500 professional astronomers from more than 100 countries worldwide. Its mission is to promote and safeguard astronomy in all its aspects, including research, communication, education and development, through international cooperation. The IAU also serves as the internationally recognised authority for assigning designations to celestial bodies and the surface features on them. Founded in 1919, the IAU is the world’s largest professional body for astronomers.


Website of the Belgian national competition:
Video of the Planetarium of the Royal Observatory of Belgium:
IAU100 International NameExoWorlds Campaign:
More information about the names Nervia and Eburonia:
IAU100 website:


Rodrigo Alvarez
Coordinator of the Belgian Steering Committee IAU100
Planetarium of the Royal Observatory of Belgium
Tel: 02 474 70 53
Anne-Lize Kochuyt
Communication and public events Planetarium
Planetarium of the Royal Observatory of Belgium
Tel: 02 474 70 57