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Extraterrestrial Life


Libra, the Scales

Libra, the Scales October 4, 2011

An artist's concept of a giant planet orbiting a star other than the Sun.

Signs of Life May 21, 2010

Radio Programs

More Trappist-1 A planet with a busy sky September 15, 2020

Tau Ceti Listening in on a neighbor April 8, 2020

Moon and Venus Living in the clouds of Venus March 28, 2020

Moon and Saturn Dipping into an intriguing ocean February 19, 2020

Living on the Sun Living on the face of the Sun January 22, 2020

AU Microscopii Making life hard for young planets October 23, 2019

Still Listening Still searching for aliens September 30, 2019

Gamma-Ray Bursts Giant cosmic “death rays” August 14, 2019

Looking for Earths Looking for Earth-sized planets June 26, 2019

Moon and Venus “Lively” stripes on Venus April 30, 2019

A Short Visit Studying a visitor from beyond February 6, 2019

Habitable Planets Counting planets in the habitable zone February 5, 2019

Bad Homes Two stars that are bad homes for life February 1, 2019

Planet Hunters Photographing hundreds of planets December 18, 2018

Biosignatures Signs of life among the stars December 17, 2018

Deadly Blasts Zapping the neighbors with energy July 16, 2018

Moon and Venus Living in the clouds of Venus July 15, 2018

Hunting Aliens Still no signs of ET July 13, 2018

Invaders Making it simple for alien invaders May 16, 2018

Extremophiles Life in the most unlikely of places November 24, 2017

Radio Power Sailing on a “breeze” of radio waves May 24, 2017

Rio Scale Rating the odds of finding ET April 14, 2017

Looking for Life Looking for life in a cold ocean March 28, 2017

Habitable or Not? Different outcomes for a nearby planet March 2, 2017

Hydrothermal Vents A starting point in the search for life February 17, 2017

Calling the Neighbors Placing a call to the neighbors November 10, 2016

Searching for Neighbors III The mystery of Tabby’s Star November 9, 2016

16 Cygni A pair of old stellar neighbors November 6, 2016

Exoplanets VI Extinct life and non-civilizations September 17, 2016

Exoplanets V Looking for signs of life September 16, 2016

Exoplanets IV Looking for distant moons September 15, 2016

Exoplanets III Hunting for life in all the right places September 14, 2016

Moon and Saturn A vigorous debate about Selenites June 18, 2016

Building a Civilization Hopping from star to star April 6, 2016

M13 Sending a long-distance message April 5, 2016

Moon and Spica Living under brilliant suns March 24, 2016

Starshade Zeroing in on habitable planets March 18, 2016

Featured Images

Artist's concept of a planet orbiting the star Tau Ceti

Inhospitable Planet April 8, 2020

Enceladus passes in front of Saturn's rings

Ocean World February 19, 2020

Artist's concept of possible Earth-like worlds in other star systems

Planet Parade April 15, 2019


Bad Homes January 31, 2019

Looking for Life December 17, 2018

artist's concept of ancient venus

Living in the Clouds? July 15, 2018

radio telescopes scan the skies for signs of intelligent life

Still Waiting July 13, 2018

Fountains from Enceladus

Cold fountains January 17, 2018

Grand Prismatic Spring, Yellowstone National Park

Extreme Life November 24, 2017

The faint star Trappist-1 and three of its planets

Cool Star, Warm Planets? September 14, 2016

WISE view of the Vela Nebula in Cygnus

Glowing Civilizations? April 1, 2014

Cassini view of a crescent Titan

Enigmatic Moon November 19, 2012

Artist's concept of global ocean on Jupiter's moon Europa

Water World September 16, 2011

Earth is in the middle of the Sun's habitable zone

In the Zone January 18, 2011

Turning On, Tuning In April 12, 2010

(Almost) Just Like Home February 21, 2010