Hello, are you there?

Search for extraterrestial intelligence has been our interest since the begining of 1900s. Around that time we started broadcasting radio signals. We’ll find an exoplanet with life on its surface any minute now (or year or decade). What song, tv series and movie should we broadcast in space to let know our alien friends what a lovely and peaceful civilization we surely are?
Andrew Rader (SpaceX engineer, MIT PhD, author)

Movie and TV series, if we want to paint a good impression, I’d go for the Contact and the original Cosmos with Carl Sagan. These demonstrate that we’re interested in bettering ourselves, understand how we fit into the Universe, and are eager to learn what’s out there.

I’m not sure how an extraterrestrial would interpret music, but I’m guessing something timeless like a great classical piece would put our best foot forward. Maybe something uplifting like Beethoven’s 9th symphony (4th movement, ode to joy)?

Antonio Paris (Astronaut Candidate, Astronomy Professor, Planetary Scientist, Space Science Author)

Ever since the first radio signal was transmitted on Earth, an expanding sphere of radio signals has been traveling outward into space from the earth. The first of early radio transmissions were short-range experiments that used simple clicks and interrupts to show transmission of information in the 1890s. In 1900, Reginald Fessenden made the first — though exceptionally faint — voice transmission over the airwaves. The next year, in 1901, saw a step up in power as Guglielmo Marconi made the first ever transatlantic radio broadcast. Since then, at a distance of about light-years away from earth, our very first radio broadcasts are beginning to arrive. While it’s fascinating to envision how far our radio signals have traveled into space, it’s improbable that a technologically advanced extraterrestrial civilization would be able to receive, listen, or understand Marconi’s message.

Due to the inverse square law, radio signals transmitted into space degrade over distance. When Marconi’s signal left earth and transmitted into space in 1901, it spread out in a wave similar to dropping a stone in a lake. The waves diffused or spread out over distance due to the exponentially larger area it had to encompass. In short, because of this inverse square law, all radio signals from Earth become indistinguishable from background noise after a few light-years. However, if we could send a microwave signal for interstellar communication, at a range from 1 GHz to 10 GHz, it is possible that an alien species could receive the signal. This is, of course, assuming that such species has the technology to detect the signal, and, more importantly, are able to interpret the signal as extraterrestrial on their part.

If for some offbeat reason I was the astronomer responsible for sending such radio signal, I would send the the piano version of Ave Maria by Franz Schubert. This is, in my opinion, one of the most beautiful and peaceful sounds we could emit into deep space. For a TV series, I would transmit Cosmoswith Carl Sagan. An intelligent extraterrestrial civilization watching Cosmos would, notionally, assume that the civilization transmitting the TV signal has a rudimentary understanding of the Universe. Lastly, for a movie, I would transmit without a doubt Independence Day. Just in case the aliens decide to invade … Independence Day should serve as an essential warning to our galactic neighbors: we will kick their ass.

Nancy Atkinson (Senior Editor for Universe Today, Host of the NASA Lunar Science Institute podcast & a NASA/JPL Solar System Ambassador)

I love the song “Trip The Light”, which was used in a “Where The Hell is Matt” video (the crazy dancing guy) in 2012. I posted it on my website (http://www.nancyatkinson.com/blog/2012/07/10/dancing-around-the-world/ ) and wrote: “I hope when future generations look back at this time in history, or if an alien civilization ever found evidence of life on Earth, this is what they’d see. All anyone ever really wants is to be happy, and sometimes dancing is the only way to express it.” The song and video also expresses a one-ness across our world that we should aspire to truly make a reality. One verse says:
Remember we’re lost together
Remember we’re the same
We hold the burning rhythm in our hearts
We hold the flame
https://youtu.be/Pwe-pA6TaZk
I don’t watch much TV, so it is hard for me to pick a TV series! The easy answer would be easy to say one of the “Star Trek” series, probably the “Voyager” series because it portrayed a widely diverse crew that had to deal with lots of adversity, and they met up with lots of different alien species (OK, that actually describes ALL of the Star Trek series….)!
As far as a movie, I’m going to go with my favorite movie of all time, “Love Actually.” It shows humanity, warts and all, but despite our failings, we can still manage to figure out how to get along.

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