Although our solar system doesn't contain gas giants with thick atmospheres enriched with helium, observations by NASA's Spitzer Space Telescope suggests the galaxy may be strewn with these planetary oddities.
Earth is in what's called the habitable zone. It's far enough from the sun that it doesn't get fried, and close enough that it gets the best of its warmth. We like to think we're special for this, but it turns out we might be pretty run of the mill.
A study based on 151 multi-planetary systems found by NASA's Kepler space telescope shows that most have a planet -- or two or three.
Astronomers have found an ancient, more compact version of our solar system, which could have implications for the search of extraterrestrial life.
NASA's Kepler spacecraft has discovered its 1,000th alien planet, further cementing the prolific exoplanet-hunting mission's status as a space-science legend.
After pointing the Allen Telescope Array at a newly-found exoplanet discovered by NASA's Kepler space telescope, SETI reports there is no transmitting alien civilization. But the search continues...
After carefully measuring the masses of small, rocky exoplanets, astronomers have come to the conclusion that our solar system may not be unique.
NASA's Kepler space telescope has detected its first new extrasolar planet after mission engineers were able to save the mission from a premature death after two of the exoplanet hunter's four stabilizing reaction wheels failed last year.
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