<p><img src="https://imgs.xkcd.com/comics/brightness.png" alt="Recently, some exoplanet astronomers have managed to use careful analysis of reflected light to discover Earth during the day."></p>
<blockquote>
<p>"<a href="https://xkcd.com/1371/">Brightness</a>", by Randall Munroe, licensed under Creative Commons Attribution-NonCommercial 2.5 License</p>
</blockquote>
<h2 id="alt-text"><a aria-hidden="true" class="anchor-heading" href="#alt-text"><svg aria-hidden="true" viewBox="0 0 16 16"><use xlink:href="#svg-link"></use></svg></a>Alt Text</h2>
<p>Recently, some exoplanet astronomers have managed to use careful analysis of reflected light to discover Earth during the day.</p>

xkcd

Brightness


# XKCD

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