<a href="https:&#x2F;&#x2F;twitter.com&#x2F;5point9billion" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;5point9billion</a> calls out the inverse: light traveling from earth out towards the nearest stars.<p>It&#x27;s a twitter bot that takes a twitter user&#x27;s birthday, and tweets to them as their &quot;light cone&quot; expands across the universe.