<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31327502</termId><termName>comets</termName><termType>PT</termType><termNote><![CDATA[ An extraterrestrial body consisting of a frozen mass and rock debris that travels around the Sun in a highly elliptical orbit; it generally developes a diffuse gaseous envelope and a long luminous tail when near the Sun. ]]></termNote><termCreatedDate>2026-03-30 20:28:15</termCreatedDate><relation><relationType>UF</relationType><termId>31327503</termId><termName>comet</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31308516</termId><termName>extraterrestrial bodies</termName><termType>PT</termType></relation><relation><relationType>BT</relationType><termId>31344782</termId><termName>rock by form</termName><termType>PT</termType></relation><relation><relationType>RT</relationType><termId>31432127</termId><termName>xihuitl</termName><termType>PT</termType></relation></term>  </Zthes>