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SETI

At the core of our explorations is the quest to know if life exists beyond Earth. The Planetary Society is a leader in the search for life on other worlds, whether intelligent or microbial. Our active projects: SETI Optical Telescope - Looking for laser signals beamed across the vastness of space. SETI Radio Searches - Huge radio dishes sift through nature's random noise for beacons from other civilizations.

SETI Projects

Optical SETI

In 2006, The Planetary Society unveiled the first All-Sky Optical SETI (OSETI) telescope. Funded by The Planetary Society and operated by a Harvard University team, it's completely dedicated to capturing that one pulse of light that might be a communication.

SETI Radio Searches

One faint signal from light-years away could prove we're not alone in this universe. The Planetary Society is committed to finding that signal -- tirelessly surveying the skies with our Southern SETI project and our Optical SETI Telescope. You can be a part of these projects and help us keep the search going.

[email protected]

[email protected] is the most successful public participation science project in history, and it is dedicated to searching for a signal from the stars. The Planetary Society made it all possible.

Project Updates

Analyzing the Reobservations

Amir Alexander • July 18, 2003

[email protected] chief scientist Dan Werthimer and his team went back to Arecibo to reobserve the most promising candidate signals detected by the project so far. Unlike most of the year, when [email protected] piggy-backs on the regular operations of the telescope, this time the Werthimer's crew had the full use of the resources of the giant dish.

Reobservations Report No. 8: Beyond the Countdown: [email protected] Makes Plans for the Future

Amir Alexander • March 27, 2003

[email protected]'s Stellar Countdown has come to an end at the Arecibo Radio Observatory. All in all the Stellar countdown observed 227 promising locations in the sky. Within the next few weeks all the data collected and recorded will be processed by [email protected] users around to world.

Reobservations Report No. 7: On Last Day at Arecibo, [email protected] Turns to Distant Planetary System

Amir Alexander • March 24, 2003

After getting bumped off the telescope last week to make way for Solar flare observations, [email protected] Chief Scientist Dan Werthimer and his crew will spend 14 hours today observing the locations of [email protected]'s most promising candidate signals, as well as a few other interesting locations.

Reobservations Report No. 6: Solar Intervention Postpones [email protected] Reobservations

Amir Alexander • March 19, 2003

[email protected]'s plans to reobserve its most promising candidate signals were interrupted today by the unexpected intervention of a Solar flare.

Reobservations Report No. 5: First Observation Session Completed at Arecibo

Amir Alexander • March 18, 2003

The [email protected] team has completed the first of its three 8-hour observation session at Arecibo, designed to revisit the most promising candidate signals detected so far by [email protected]

Reobservations Report No. 4: Results in Real Time

Amir Alexander • March 17, 2003

[email protected] scientists will have to wait for several weeks for the full analysis of the data collected during the reobservations. But even while the observations are going on at Arecibo, they will already have a good idea if they have found something significant.

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