目前人类的飞行器登陆过月球、火星，相信在不久的将来会登陆更多星球。在整个太阳系中，太阳是最大也是最耀眼的星球。假如人类要登陆太阳，都会有哪些困难呢？
Right now, NASA is exploring the sun like never before.
In 2018, it launched the Parker Solar Probe, which is swooping to within 6.2 million kilometers of the Sun's surface, the closest we've ever been.
But what if we wanted an even closer look?
Our first stop gets pretty hot.
At seven million to ten million kilometers above the sun's surface, we reach the corona, the outermost layer of the sun.
It blazes at one million degrees Celsius, nearly 900 times as hot as lava.
And it's tens of thousands of times brighter here than on Earth.
Now, the probe's heat shield works like a very good mirror, reflecting 99.9% of the incoming light.
But we'll need something even better as we get closer.
At about 3,000 kilometers above the surface, we reach the chromosphere, the second layer of the sun.
