<rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Hacker News: pietro42</title><link>https://news.ycombinator.com/user?id=pietro42</link><description>Hacker News RSS</description><docs>https://hnrss.org/</docs><generator>hnrss v2.1.1</generator><lastBuildDate>Tue, 28 Jul 2026 04:38:22 +0000</lastBuildDate><atom:link href="https://hnrss.org/user?id=pietro42" rel="self" type="application/rss+xml"></atom:link><item><title><![CDATA[New comment by pietro42 in "Google Nears $1 Billion Investment in SpaceX"]]></title><description><![CDATA[
<p>If my napkin-calculations are correct, 4025 stats @ 1100 km LEO orbit would occupy 0.0000000573% of the sky - so not a real problem, I believe ;) (if they are in the same plane, that is and each have 10mx10mx10m bounding area...)<p><pre><code>  ((10/1000)**2*4025)/(4*pi*(6371+1100)**2)*100 %</code></pre></p>
]]></description><pubDate>Tue, 20 Jan 2015 16:37:52 +0000</pubDate><link>https://news.ycombinator.com/item?id=8917705</link><dc:creator>pietro42</dc:creator><comments>https://news.ycombinator.com/item?id=8917705</comments><guid isPermaLink="false">https://news.ycombinator.com/item?id=8917705</guid></item></channel></rss>