Philips Atlas of the Universe

THE UNIVERSE

All these stars are within 30 light-years of the Sun, and may be

regarded as possible targets for future SETI investigations.

Star Spectrum Apparent Luminosity, Distance

mag. Sun
 1 l.y.

ÂEridani K0 3.8 0.3 10.7

ÂIndi K5 4.7 0.1 11.2

ÙCeti K0 3.5 0.35 11.9

ÚOphiuchi K0 4.0 0.35 17

‰Pavonis G5 3.6 1.0 18

ÛDraconis K0 4.7 0.3 19 Alrakis

̄Draconis F7 3.6 2.0 19

‚Hydri G1 2.8 2.3 26

·Piscis Australis A3 1.2 13 22

Fomalhaut

ÍBoötis G8 4.6 0.5 22

̇Tucanae G0 4.2 0.8 23

^3 Orionis F6 3.2 2.3 25

·Lyrae A0 0.0 52 26 Vega

61 Virginis G8 4.7 0.6 27

ÌHerculis G5 3.4 2.2 26

ÁLeporis F8 3.8 2.0 26

‚Comae G0 4.3 1.2 27

‚Canum G0 4.3 1.3 30 Chara

Venaticorum

SELECTED TARGET STARS

DECLARATION OF PRINCIPLES

Declaration of principles concerning activities following

the detection of extra-terrestrial intelligence. Passed at the

General Assembly of the International Astronomical Union

at Buenos Aires, Argentina, July 1991.

1. Any individual or institute believing that any sign of ETI
   has been detected should seek verification and confirmation
   before taking further action.


2. Before making any such announcement, the discoverer
   should promptly notify all other observers or organizations
   which are parties to this Declaration. No public announcement
   should be made until the credibility of the report has been
   established. The discoverer should then inform his or her
   national authorities.


3. After concluding that the discovery is credible, the
   discoverer should inform the Central Bureau or Astronomical
   Telegrams of the International Astronomical Union, and
   also the Secretary-General of the United Nations. Other
   organizations to be notified should include the Institute
   of Space Law, the International Telecommunication Union,
   and a Commission of the International Astronomical Union.


4. A confirmed detection of ETI should be disseminated
   promptly, openly and widely through the mass media.


5. All data necessary for confirmation of detection should
   be made available to the international scientific community.


6. All data relating to the discovery should be recorded,
   and stored permanently in a form which will make it available
   for further analysis.


7. If the evidence of detection is in the form of
   electromagnetic signals, the parties to this Declaration
   should seek international agreement to protect the
   appropriate frequencies. Immediate notice should be
   sent to the Secretary-General of the International
   Telecommunication Union in Geneva.


8. No response to a signal or other evidence of ETI should
   be sent until appropriate international consultations have
   taken place.


9. The SETI (Search for Extra-Terrestrial Intelligence)
   Committee of the International Academy of Astronautics,
   in co-ordination with Commission 51 of the International
   Astronomical Union, will conduct a continuing review of
   all procedures relating to the detection of ETI and the
   subsequent handling of the data.

MESSAGE BEGINS

MESSAGE ENDS

100111

1

0 0 0 0 1 0 1 0 1 0 0 0 0 0 1 1 1 1 1 1 1 0 0 1 0 0 1

0

011111000000011100000111111

1

1 0 0 1 0 1 1 1 1 1 0 1 0 0 1 0 1 1 1 1 1 0 1 0 0 1 1

0

1 11110100101111101001011111

0

0 0 0 0 0 0 1 1 0 1 1 0 0 0 0 1 0 1 1 1 1 1 0 1 0 0 1

1

1 01100000011011000000110110

0

1 0 0 1 0 0 0 1 1 0 1 1 0 0 0 0 0 0 1 1 0 1 1 0 0 0 0

1

011001

▲
 Interstellar code.

Signals of two definite types –

one positive, one negative –

are transmitted. If the positive

signals are taken as black

and the negative are white

and arranged in a grid,

a pattern emerges. Here

209 signals are sent (top),

of which the only factors are

19 and 11 (19  11 
209).

If the grid is 19 wide, the

pattern is meaningless (above).

But if it is 11 wide, a figure

emerges (left).

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