<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>XzAeRosho</author><text>&amp;gt;“We didn’t expect there to be so much iron density at that altitude. It comes from meteors that enter the atmosphere at high speed, burn up and [then] the metal atoms are left suspended. The iron layer is normally a little bit higher. In our case, we hypothesized that on that day there were gravity waves [a wave phenomenon in the air] and the iron layer was lowered,” says Passas Varo.&lt;p&gt;That still sounds like so many different things happening at the right time, but that would also explain their elusive nature and difficulty to capture and study.</text><parent_chain></parent_chain></comment><story><title>Origin of mysterious green &apos;ghosts&apos; in the sky has been discovered</title><url>https://english.elpais.com/science-tech/2023-12-12/the-origin-of-mysterious-green-ghosts-in-the-sky-has-been-discovered.html</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>pelorat</author><text>I wholeheartedly recommend the YouTube channel of Hank Schyma, aka Pecos Hank.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;@PecosHank&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;@PecosHank&lt;/a&gt;&lt;p&gt;Here&amp;#x27;s one of his videos about the green ghosts:
&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=sIaYOdujmz4&quot; rel=&quot;nofollow noreferrer&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.youtube.com&amp;#x2F;watch?v=sIaYOdujmz4&lt;/a&gt;</text><parent_chain></parent_chain></comment><story><title>Origin of mysterious green &apos;ghosts&apos; in the sky has been discovered</title><url>https://english.elpais.com/science-tech/2023-12-12/the-origin-of-mysterious-green-ghosts-in-the-sky-has-been-discovered.html</url></story>