> Can I assume that the use of "star" is a general term to describe=20
> planets or do they intend to refer to stars.


I read up on optical SETI last night.   The idea seems to be that you add v=
ery narrow pulses of laser light to the spectrum of the star.
Another civilization would have optical telescopes, and would have discover=
ed spectroscopy.  That's not enough though.
Looking at the spectrum by normal means, the signal is buried below the noi=
se.  You also have to do an FFT on the spectrum data, which then reveals th=
is anomalous, very narrow line.
As the papers said, there is no known process in nature which sends such na=
rrow pulses (time and wavelength) at the appropriate power levels.

Of course it may be something like pulsars, which got the designations "LGM=
1" etc at first.=20

Either way, "WTF is that?" is the sound of science happening.

It promises to be interesting.

--=20
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