archive: May Scientific American article on Optical SETI

May Scientific American article on Optical SETI

Larry Klaes ( )
Thu, 13 May 1999 15:17:14 -0400

Also includes the One Hectare Telescope (1HT) from
The SETI Institute and Active SETI.

To quote in part:

Even as the traditionalist alien hunters plan to sift once
more through the radio spectrum with ever finer combs, several
high-profile astronomers are beginning to look for optical

In one analysis, Harvard University physicist Paul Horowitz
estimated that the $1-billion Helios laser being planned at
Lawrence Livermore National Laboratory could send nanosecond-
long pulses that would appear 3,000 times brighter than our
own Sun to worlds up to 1,000 light-years away.

More advanced extraterrestrials might aim such beacons at
many star systems at once, including our own.