corona

During the total solar eclipse, scientists were able to observe the corona extending millions of miles into space.

(Chinese) 在日全食期间，科学家们能够观察到延伸到太空数百万英里的日冕。

The corona is much hotter than the surface of the sun, a phenomenon that still puzzles many astronomers.

(Chinese) 日冕比太阳表面热得多，这一现象仍让许多天文学家感到困惑。