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The IAU's names for exoplanets – and on most occasions their host stars – are chosen by the Executive Committee Working Group (ECWG) on Public Naming of Planets and Planetary Satellites, a group working parallel with the Working Group on Star Names (WGSN). [1] Proper names of stars chosen by the ECWG are explicitly recognised by the WGSN. [1]
For exoplanets orbiting a single star, the name is normally formed by taking the name of its parent star and adding a lowercase letter. A provisional IAU-sanctioned standard exists to accommodate the naming of planets that orbit two stars, which are known as circumbinary planets. A limited number of exoplanets have IAU-sanctioned proper names.
There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets. Artist's concept of the potentially habitable exoplanet Kepler-186f As of 14 February 2025, there are 5,834 confirmed exoplanets in 4,356 planetary systems , with 977 systems having more than one planet . [ 1 ]
The first such project (NameExoWorlds I), in 2015, regarded the naming of stars and exoplanets. [1] 573,242 votes were submitted by members by the time the contest closed on October 31, 2015, and the names of 31 exoplanets and 14 stars were selected from these. [2] Many of the names chosen were based on world history, mythology and literature. [3]
The term is usually applied to adventures published for all Dungeons & Dragons games before 3rd Edition. For 3rd Edition and beyond new publisher Wizards of the Coast uses the term adventure. For a list of published 3rd, 4th, and 5th Edition Adventures see List of Dungeons & Dragons adventures.
The individual planet data pages also contain the data on the parent star, including name, distance in parsecs, spectral type, effective temperature, apparent magnitude, mass, radius, age, and celestial coordinates (Right Ascension and Declination).
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D&D Beyond (DDB) is the official digital toolset and game companion for Dungeons & Dragons fifth edition. [1] [2] DDB hosts online versions of the official Dungeons & Dragons fifth edition books, including rulebooks, adventures, and other supplements; it also provides digital tools like a character builder and digital character sheet, monster and spell listings that can be sorted and filtered ...