How to Signal Aliens

Posted: June 17, 2015 by

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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/627/1/534/ (open access)

Kepler data access page (public data):
http://keplergo.arc.nasa.gov/DataAnalysisRetrieval.shtml

COROT data access page (ESA’s transit telescope, also public data):
http://idoc-corot.ias.u-psud.fr

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