scott kildall on "tweets in space" at a laser
DESCRIPTION
Scott Kildall on "Tweets in Space" at a LASER http://www.scaruffi.com/leonardoTRANSCRIPT
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Tweets in Space
a project by Scott Kildall and Nathaniel Stern
LASERSan FranciscoMarch 2012
tweetsinspace.org
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Second Front — performance art group in Second Life
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Uncertain LocationVideo and Prints
2007
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Gift Horse (in collaboration with Victoria Scott)Sculpture, Public Performance
2010
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2049 — Play the role of a Future ProspectorArtist in Residence at the Dump (Recology SF)
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Wikipedia ArtIntervention (in collaboration with Nathaniel Stern)
2009
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work that the public performsbut also performs the public
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Ideal conditions to support alien life
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Ideal conditions to support alien life
(we think)
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gettingofftheplanet.org
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September 19-27, 2012Albuquerque, New Mexico
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Send a tweet with #TweetsInSpace
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Being human is ok, but I wish therewere alternatives. #TweetsInSpace
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Meat or Pets? #tweetsInSpace
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I choose pets, but does this presupposeself-awareness? I think yes. #TweetsInSpace
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trans-human or trans-alien, what is youstake in self-augmentation? #tweetsInSpace
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We wonder about your DNA? #gattaca #TweetsInSpace
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real-time performance oflive discussion
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aliens in popular culture —reflection of ourselves
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popular culture
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popular culture
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popular culture
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Good Alien Bad Alien
Should we attempt contact?
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what would we say to them?
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A brief history* ofdeep-space transmissions
* this is by no means complete
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Interstellar Radio Messages (IRMs)
METI (messaging to extra terrestrial intelligence)
1. Where to signal.
2. When to signal.
3. The wavelength of the signal.
4. What polarization should be used.
5. The power of the transmitted radio emission.
6. What modulation should be used.
Use radio telescopes as transmitters
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Morse Message Transmitter, 1962Evpatoria Planetary Radar
Morse Message (1962)
Target: Venus
Transmission:MIR
LENINSSSR
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Arecibo Message, November 1972Sent to global star cluster M13 25,000 light years away
1. The numbers one (1) through ten (10)2. The atomic numbers of the elements hydrogen,
carbon, nitrogen, oxygen, and phosphorus, which make up deoxyribonucleic acid (DNA)
3. The formulas for the sugars and bases in the nucleotides of DNA
4. The number of nucleotides in DNA, and a graphic of the double helix structure of DNA
5. A graphic figure of a human, the dimension (physical height) of an average man, and the human population of Earth
6. A graphic of the Solar System7. A graphic of the Arecibo radio telescope and the
dimension (the physical diameter) of the transmitting antenna dish
Arecibo Message (1972)
Target: M13
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Sent from RT-70 in Yevpatoria
First transmission of music, including the “1st Theramin Concert for Aliens” — 7 sections composed by Russian teenagers
Teen Age Message (2001)
Target: 6 different systems
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Cosmic Call, Privately funded messagesSent from RT-70 in Yevpatoria
Contents include:* Interstellar Rosetta Stone* Copy of Arecibo Message* 282 Flags of the World* “Starman” song by David Bowie* Music by KFT (Hungarian Rock Band)* Drawings by Ukranian schoolchildren
Cosmic Call (1999, 2003)
Target: 8 different systems
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NASASent from Deep Space Network, Madrid
Beatles song, “Across the Universe”
Across the Universe (2008)
Target: Polaris
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who decides what getstransmitted to potential
alien cultures?
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Pioneer PlaquesPlaced on Pioneer 10 & 11 (1972-73)
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trusting in selective institutionsto make these decisions.
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Sent from RT-70 in Yevpatoria
501 Messages gathered in competition on
social networking site Bebo.com
A Message from Earth (2008)
Target: Gliese 581c
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Hello from EarthSent from NASA Deep Space Station 43 dish
thousands of messages selected from submissions to website approved by COSMOS magazine
Hello from Earth (2009)
Target: Gliese 581d
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Tweets in Space:uncurated, conversation
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Why Tweets in Space?
1. Democratic2. Self-reflexivity of Twitterverse
3. Unique Performance4. Massive discovery of exoplanets
5. Custom-built Laser
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Habitable Zone / “Goldilocks” Planets
Liquid WaterStable orbiting of a star (or two)Axial Tilt — formation of seasons
Objections: could support an alternate biochemistry, e.g. methane or ammonia
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DIY ProjectOpen Source
~25K
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Features of Gliese 667Cc (a.k.a. GJ667Cc)
22 light years from Earthorbits a dwarf star (Gliese 667C)
— 37% size of the Sun28 days to orbit its star
mass is 3.9 times that of Earth“habitable” planet, probably liquid water
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
Currently working onstage 1 prototype
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
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Advantages of optical (laser) messaging:
1. access — license-free2. cheap — small, easy to set-up
3. new — hasn’t been done before
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Technical Challenges
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Technical Challenges
1. High-powered Laser
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
1.5 milliradians = 0.086 degrees
1 Watt * ((1.5e-3 rad)^2/(4*pi sterians))^-1 /(22*9.4e15 meters)^2 = 1.3e-28 W/m^2
1 Watt Laser @ 1.5 mRad beam divergence
Calculating beam coherence / photonic flux
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DIY ProjectOpen Source
~25K
The energy of each photon from a 532 nm laser is E = hc/lambda = 6.626e-34*2.998e8/532e-9 = 3.7340e-19 Joules
Calculating photons
With a flux of 1.3e-28 W/m^2 for that beam, you would have 1.3e-28/3.7340e-19 = 3.4815e-10 photons/(second meter^2) at the exoplanet.
Very larger receiver = 44,000 photons/second
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Aliens could have advancedlistening and/or pattern-recognition
technology
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Technical Challenges
1. High-powered Laser2. Safety
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
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Technical Challenges
1. High-powered Laser2. Safety3. Accuracy
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DIY ProjectOpen Source
~25K
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DIY ProjectOpen Source
~25K
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Stage 1 Prototype
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Makes us deeply considerour online communication.
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I have to say, when I went to Twitter and saw that no one had yet used the #tweetsinspace hashtag, I couldn't bring myself to be the first. What would I say? While this seems like a fun,
light, creative experiment -- it stopped me dead in my Tweeting tracks, too. Interesting.
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Thank you. #tweetsInSpace
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Links
Tweets In Space website: tweetsinspace.org
Scott Kildall: kildall.comNathaniel Stern: natanielstern.com
Getting off the Planet: gettingofftheplanet.orgISEA 2012: isea2012.org
email: [email protected]: @kildall