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The Great Exoplanet Debate, part 4: Questioning Habitability
Topic: Alien Life
Summary: At a NASA conference, a panel of exoplanet scientists held a lively discussion about some of the most important issues facing the search for and understanding of planets orbiting far-distant stars. In part four of this series, the panelists answer some questions from the audience.

The Great Exoplanet Debate, part 3: Limits to Determining Habitability
Topic: Alien Life
Summary: In part three of The Great Exoplanet Debate, the panel discusses our broadening view of the 'habitable zone' around different star types, and our preconceptions of what makes a 'habitable environment.'

The Great Exoplanet Debate, part 2: Concepts of Habitability
Topic: Alien Life
Summary: In part two of The Great Exoplanet Debate, the panel discusses current concepts of habitability and how they are changing. This debate comes from a plenary session hosted by Astrobiology Magazine at the 2012 Astrobiology Science Conference.

The Great Exoplanet Debate PART 1: Worlds of Expertise
Topic: Alien Life
Summary: At the 2012 Astrobiology Science Conference, Astrobiology Magazine hosted a plenary session titled: "Expanding the Habitable Zone. The Hunt for Exoplanets Now and Into the Future."

Gravitational Telescope Creates Space Invader Mirage
Topic: Alien Life
Summary: The NASA/ESA Hubble Space Telescope is one of the most powerful available to astronomers, but sometimes it too needs a helping hand. This comes in the form of Einstein's general theory of relativity.

Detecting Life on Planets that Orbit White Dwarf Stars
Topic: Alien Life
Summary: A white dwarf is a dead star that slowly cools down until it fades into oblivion. Yet it has been predicted that habitable planets can orbit a white dwarf. If we can somehow detect these planets, would we also be able to spot signs of life?

Searching for a Pale Blue Sphere
Topic: Alien Life
Summary: The Planetary Habitability Laboratory (PHL), which maintains the Habitable Exoplanets Catalog, is now joining in efforts to actually discover new exoplanets. Using new algorithms based on pattern recognition, the PHL is now searching for Earth-like worlds in data from NASA's Kepler telescope.

Designing a Telescope to Detect Alien Life
Topic: Alien Life
Summary: Astronomers have published a new study that claims it could be possible to detect signs of extraterrestrial life within the next 25 years - and without the need for a space mission.

Intelligent Alien Civilizations Rarer than One in a Million
Topic: Alien Life
Summary: Scientists have used a telescope to search for intelligent radio signals from planets around 86 of the stars that NASA's Kepler mission has identified as potential planet hosts.

Life Possible on Extrasolar Moons
Topic: Alien Life
Summary: A new study finds that exomoons are just as likely to support life as exoplanets. The research focuses on the potential for moons around giant exoplanets that orbit in the habitable zone of their host star.

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