Atomically precise sensors could detect a planet much like our own: Earth 2.0: This artist's rendition shows how an Earth-like exoplanet might appear

Gazing into the dark and seemingly endless night sky above, people have long wondered: Is there another world like ours out there, somewhere? Thanks to new sensors that we and other astronomers are developing, our generation may be the first to get an affirmative answer-and the earliest hints of another Earth could come as soon as this year.