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Listening telescope for space aliens shut down by cutbacks

The search for intelligent life in the universe, at least beyond planet Earth, has been dealt a major blow by government budget constraints. Full story

Kepler offers 'treasure trove' of star information

NASA's planet-hunting Kepler space observatory has turned out to be a jack-of-all-trades — a multipurpose spacecraft that has gone beyond its alien world mandate to tackle some key star mysteries. Full story

New Image Is Worth 1,235 Potential Alien Planets

A photo may be worth 1,000 words, but a new depiction of NASA's Kepler mission is worth 1,235 potential alien planets. Created by a devoted mission scientist, the image takes stock of the Kepler observatory's prolific planet-hunting results so far. Full story

Earth-Like Worlds Might Be as 'Common as Ants at a Picnic'

The discovery of a trove of potential alien planets, including dozens that could be Earth-size or habitable, is heartening news for those hoping to discover E.T. one day. Full story

A tourist's guide to new Kepler-11 planet system

The new discovery of six alien planets orbiting a sunlike star may be only a small part of the data released Wednesday from NASA's planet-hunting Kepler mission, but it is significant as the most tightly packed planetary arrangement around a single star yet discovered. Full story

Planet Hunter Bill Borucki Calls Kepler Discoveries 'Game-Changing'

Scientists announced yesterday (Feb. 2) that NASA's Kepler mission has discovered 1,235 alien planet candidates, including 54 that orbit in their host stars' habitable zone — that just-right range of distances that allow liquid water to exist. Full story

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NASA's Prolific Planet Hunter: Kepler Telescope By-The-Numbers

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Exoplanet Bonanza Boosts Count by 1,200

Astronomers Find 6-Pack of Planets in Alien Solar System

Life on other planets? Leading expert weighs in

Tiny, Earth-Like Planet Discovered

How Scientists Know Alien Planet Kepler-10b is a Small, Rocky World

NASA Discovers Smallest Alien Planet Yet

How will we know if there is alien life?

500th Alien Planet Discovered, With Hundreds More to Come

Related Photos

Planet graphic
Planet graphic

This graphic shows the 1,235 candidate planets reported so far by NASA's Kepler mission, in proportion to their parent stars. For comparison's sake, our own sun is shown as well. It's just below the top row on the right, with Jupiter and Earth silhouetted against the disk.

Kepler-9 planets
Kepler-9 planets

An artist's conception shows two Saturn-sized planets discovered by NASA's Kepler mission.