PJ Woods<p>Cliff swallow nests by the well-known Chaco 1054 Supernova rock art panel. Chinese records indicate July 4 1054 as when this "guest star" appeared, when the moon was nearly at first quarter. This supernova created the Crab Nebula. Halley's Comet appeared in 1066. At the middle bottom are concentric circles and faint red pigment flowing to the right, plausibly a record of that comet's appearance.<br><a href="https://mastodon.social/tags/rockart" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>rockart</span></a> <a href="https://mastodon.social/tags/archaeology" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>archaeology</span></a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>astronomy</span></a> <a href="https://mastodon.social/tags/hiking" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>hiking</span></a> <a href="https://mastodon.social/tags/chaco" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>chaco</span></a> <a href="https://mastodon.social/tags/newmexico" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>newmexico</span></a> <a href="https://mastodon.social/tags/ancestralpuebloan" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>ancestralpuebloan</span></a> <a href="https://mastodon.social/tags/desert" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>desert</span></a> <a href="https://mastodon.social/tags/pjwoods" class="mention hashtag" rel="nofollow noopener noreferrer" target="_blank">#<span>pjwoods</span></a></p>