다음 글의 내용과 일치하는 것은? It took humans thousands of years to explore our own planet and centuries to comprehend our neighboring planets, but nowadays new worlds are being discovered every week. To date, astronomers have identified more than 370 “exoplanets,” worlds orbiting stars other than the sun. Amid such exotica, scientists are eager for a hint of the familiar: planets resembling Earth, orbiting their stars at just the right distance―neither too hot nor too cold― to support life as we know it. No planets quite like our own have yet been found, because they’re inconspicuous. To see a planet as small and dim as ours amid the glare of its star is like trying to see a firefly in a fireworks play; to detect its gravitational influence on the star is like listening for a cricket in a tornado. Yet by pushing technology to the limits, astronomers are rapidly approaching the day when they can find another Earth and interrogate it for signs of life.