Gault
Gault was an inhabited planet. This was the home of a Federation colony with a sparse population of no more than 20,000 inhabitants. It was widely regarded as a "farmworld". (; )

In 2346, Sergey and Helena Rozhenko lived on Gault with their son, Nikolai; the following year, their adopted son Worf went to live there. One of the secondary schools on Gault had a soccer team which Worf ed in 2353 at the age of thirteen. Worf headed a ball into the goal and accidentally killed the opposing player named Mikel. (; )

Appendices

Background information 

"GALT" was the pronunciation for this planet's name from the script pronunciation guide for "Let He Who Is Without Sin". 

According to StarTrek.com, Gault was an M-class planet. 

According to the Star Trek: Star Charts ("United Federation of Planets I"), in 2378, Gault was a Federation member.

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Planets
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