Balrog Macula is the largest of the "

Brass Knuckles Brass knuckles (variously referred to as knuckles, knucks, brass knucks, knucklebusters, knuckledusters, knuckle daggers, English punch, iron fist, paperweight, or a classic) are "fist-load weapons" used in hand-to-hand combat. Brass knuckles ...

", a series of equatorial dark regions on

Pluto Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of trans-Neptunian object, bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the S ...

. It is the largest dark equatorial feature on Pluto after the

Cthulhu Macula Cthulhu Macula (formerly ''Cthulhu Regio'') is a prominent surface feature of the dwarf planet Pluto, that is reminiscent of a whale in shape. It is an elongated dark region along Pluto's equator, long and one of the darkest features on Pluto. ...

, and is located in the middle of the

leading hemisphere The poles of astronomical bodies are determined based on their axis of rotation in relation to the celestial poles of the celestial sphere. Astronomical bodies include stars, planets, dwarf planets and small Solar System bodies such as comets and m ...

. It is named after the

balrog A Balrog () is a powerful demonic monster in J. R. R. Tolkien's Middle-earth. One first appeared in print in his high-fantasy novel ''The Lord of the Rings'', where the Fellowship of the Ring (characters), Fellowship of the Ring encounter a Bal ...

s, a race of demons in the fiction of

J. R. R. Tolkien John Ronald Reuel Tolkien (, ; 3 January 1892 – 2 September 1973) was an English writer and philology, philologist. He was the author of the high fantasy works ''The Hobbit'' and ''The Lord of the Rings''. From 1925 to 1945, Tolkien was ...

References

{{Pluto Regions of Pluto Extraterrestrial surface features named for Middle-earth