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Memo from
JOSHUA LEDERBERG

MAY 10 1976

. photon pollution

Dear Dr. Aspin:

Until now, sea c. have been only

[perhaps with the exception
ith astronomical observation],
but the attac icture gave 4 glimpse of
e skies of our cities if

an ugly future for th
this particular technology gets out of hand.

rehlights et

  
   

a demonstration of the proj- x
ing information by laser; and
411 be a mch greater incentivd

ight a/c of the pictorial

The peture is
jection of advertis
it is obvious this w
than the pare searchl

detail.

I don't know whether the FCC already has
he system does not

jurisdiction; as in pringdl
er radar;

necessarily dif 7
sible ° or-of Broadcast

i"

oe

JODIUNWLUOD JO

much easier to protect
inted sky if some
wait till there .

Anyhow, it should be
the public resource of an unpa

action is taken now than if we
been a large entrepreneurial investment. The

has
task of writing reasonable legislation will not i"
ibit people Pi

be easy, since we hardly want to proh
from pointing 4 flashlight upwards; but I think
that power-density thresholds could be devised

coupled with an intent to communicate with
numbers of people.

e

    
 
 

Paley

Sinaarely,

Ut An
OFESSOR JOSHUA LEDERBERG
Department of Genetics
School of Medicine
Stanford University
Stanford, California 94305

  
  

UO!

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