translation.en: This is just a tiny part of the sky the Kepler stares at, where it searches for planets by measuring the light from over 150,000 stars, and very precisely.
translation.zh: 这只是开普勒观测行星的 范围中的一小块儿。 通过每半个小时一次 精确地测量全部15万颗 行星的光谱。