English Wikipedia has an article on: <span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rate</span> Wikipedia <span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rate</span> (plural <span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rates</span>) (astronomy) The number of meteors...
<span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rates</span> plural of <span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rate</span>...
ZHR (astronomy) Initialism of <span class="searchmatch">Zenithal</span> <span class="searchmatch">Hourly</span> <span class="searchmatch">Rate</span>....