<?xml version="1.0" encoding="utf-8"?><!DOCTYPE Zthes SYSTEM "http://zthes.z3950.org/xml/zthes-05.dtd">  <Zthes><term><termId>31444043</termId><termName>spectroheliographs</termName><termType>PT</termType><termNote><![CDATA[ Instruments which capture images of the sun by using only particular wavelengths of light, specifically Balmer emission lines of hydrogen.  ]]></termNote><termCreatedDate>2026-03-30 20:52:52</termCreatedDate><relation><relationType>UF</relationType><termId>31444044</termId><termName>spectroheliograph</termName><termType>ND</termType></relation><relation><relationType>BT</relationType><termId>31383815</termId><termName>astronomical instruments</termName><termType>PT</termType></relation></term>  </Zthes>