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...rare bright spot for employment. "The jobs are really coming in this field," says Karen Marcus, a "green niche coach" who was advising applicants at the Columbia fair. "We're finally mainstreaming the green career. We're on the cusp of opportunity." (See TIME's photos: "This Fragile Earth...
...important because even if Kepler were to detect any telltale fluctuations in stellar light, that wouldn't be proof of a planet. The telescope would have to keep looking and see if the flickering is repeated roughly once a year, or about the time it would take an Earth-like planet to circle around its star and pass in front again. Record three or four such passes, and you can be pretty sure you've got a planet - hence the 3½-year mission...
...planetary census Kepler takes will be very important for understanding the frequency of Earth-sized planets in our galaxy," says Jon Morse, director of NASA's astrophysics division...
...good thing about a census like this one is that even a few sightings can tell you a lot. Spot a handful of Earth-like planets among 100,000 stars, then factor up to 70 sextillion, and you've got whole lot of warm, cozy worlds potentially cooking up a whole lot of life. On one of those worlds, someone may even be looking back as our own planet passes in front of the porch light...
Read "More Planets Like Earth...