Are we alone?
Let’s find out.

Leading the search for life beyond Earth.

The SETI Institute is a 501(c)(3) nonprofit dedicated to finding out.

Happy 65th Anniversary to the Drake Equation!

Frank Drake with the Drake equation

November 1-3, 1961 in West Virginia

  • What It Is: A probabilistic formula, devised by Dr. Frank Drake in 1961, to estimate the number of communicative civilizations in the Milky Way.
  • Purpose: Serves as a conceptual roadmap for astrobiology and the search for extraterrestrial intelligence (SETI).
    Key Variables Include:
     - R*: Rate of star formation
     - fₚ: Fraction of stars with planets
     - nₑ: Planets per star capable of supporting life
     - fₗ, fᵢ, fc: Fractions relating to life, intelligence, and detectable communication
     - L: Longevity of civilizations
  • Why It Matters: Guides scientific inquiry into extraterrestrial life—driving research on exoplanets, astrobiology, and SETI efforts.
News

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Planetary Picture of the Day - Week of October 26, 2026
Nov 4, 2026 • PPOD
Planetary Picture of the Day - Week of October 26, 2026
Last week, we explored the wonders of our universe, from Perseverance's record-setting journey across Mars and the city of Toulouse seen from orbit to JWST's breathtaking view of the Orion Nebula. We also looked ahead to Hayabusa2's future asteroid encounters and celebrated Halloween with a hauntingly beautiful photograph of the Milky Way.
The Search: September 2026
Nov 4, 2026 • SETI Institute in the News • SETI Institute • Community • The Search • Rebecca Robinson • LaserSETI • Vishal Gajjar • SETI • ATA • AI and Machine Learning • Pascal Lee • Education • AAA • Dana Backman • Coral Clark • UAPs • Bill Diamond
The Search: September 2026
When Should We Listen for Alien Signals? SETI Institute Scientists Turn to Game Theory
Nov 3, 2026 • Press Releases • SETI • ATA • ATSAT • Sun • Astronomy • Sofia Sheikh
When Should We Listen for Alien Signals? SETI Institute Scientists Turn to Game Theory
SETI Institute

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About

What We Do

At the SETI Institute, we explore the origins of life, the search for extraterrestrial intelligence, and the mysteries of the cosmos. Through cutting-edge research, education programs, and public outreach, we strive to expand humanity's understanding of the universe.

Research

We lead scientific investigations into planetary environments, astrobiology, and the search for life beyond Earth.

Education

Our educational initiatives inspire and train the next generation of scientists, fostering curiosity and innovation.

Outreach

We engage the public with space science and discovery, making complex scientific ideas accessible and exciting for all.

Careers

Searching for life
is a team sport.
Want to join?

Research

Featured Projects

Featured Image
ATA • Radio Astronomy • Hat Creek Radio Observatory • HCRO
The Allen Telescope Array (ATA)
The ATA is the first radio telescope designed from the ground up to be used for SETI searches. #ATA #Radio Astronomy #Hat Creek Radio Observatory #HCRO
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COSMIC • VLA
COSMIC at the Very Large Array
The Commensal Open-Source Multimode Interferometer Cluster (COSMIC) is a new commensal Ethernet-based digital signal processing backend and computer cluster on the VLA in New Mexico operated through the NRAO. #COSMIC #VLA
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Discovery and Futures Lab
Discovery and Futures Lab
What happens if life beyond Earth is discovered? The Discovery and Futures Lab at the SETI Institute fosters novel and anticipatory research at the intersection of science, society, our planet, and the search for life beyond Earth.  #Discovery and Futures Lab

 

 

Video

How SETI Designed A Telescope To Look For Extraterrestrial Civilizations

In 2025, we invited Scott Manley for a tour of the Allen Telescope Array in Hat Creek, CA. Take an in-depth look of the facilities and research happening at the Hat Creek Radio Observatory!

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SETI Institute

Scientists are getting closer in their search for life beyond earth. But with limited federal funding for the search for extraterrestrial intelligence, supporters are the reason cutting-edge scientists can keep their eyes on the sky.