九百台望远镜与一年一次的机会

研究系外行星大气需要捕捉其凌日过程中的星光，但由于信号极其微弱且机会难得，传统的观测方式面临挑战。来自上海的研究团队提出了一种新方案，通过协同九百台一米级望远镜共同观测来获取数据。

Reading the atmosphere of another world means catching starlight as it filters through that planet's air during a transit. The signal is about one part in a million and a true Earth twin transits only once a year, so you cannot simply repeat the measurement until the noise averages away. Each attempt has to work on its own. A team led from Shanghai has proposed the alternative to building an impossibly large mirror in space - nine hundred, one metre telescopes, flying together, watching the same transit and analysing the light together.