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.