How to Signal Aliens

From the creator

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! http://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7g Let us know what topics you want to learn more about: http://bit.ly/spacetimepoll Everyone has their own opinion as to whether or not aliens exist. But let’s assume they do for a second and we wanted to let them know we're here!!!! How should we signal our species' existence through the expanse of space? There are a few options, but which is the most effective and the cheapest? Find out in this week’s episode of PBS Space Time! Congrats to last week’s Balloon Challenge Winners! Юра Сороквторой Jonathan LeMoine Russell Subedi Stan Aron Alexander Keebler Extra Credit: Low detectability of our radio leakage by aliens (and vice-versa): http://www.jbis.org.uk/paper.php?p=2014.67.17 http://arxiv.org/pdf/1102.1938.pdf (free version of above) http://www.faqs.org/faqs/astronomy/faq/part6/section-12.html http://arxiv.org/abs/1007.0850 Benford, Benford, Benford paper: http://arxiv.org/abs/0810.3966 Laser beacons / Optical SETI: http://www.astronomynow.com/news/n1004/20seti4/ Also discussed in Benford paper Luc Arnold paper on Transit Signatures of Artificial Objects: http://iopscience.iop.org/0004-637X/627

Published 2015-06-17 · Watch on YouTube ↗
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