Fun fact: Mercury is nearly 3 times closer than Earth to the sun.
We have sent many space explorers but after all this we know very little about it like do you know that on Mars you will live long because of its weak gravity? Or that inside Earth there can be 6 Mars can live? but after all these they both have nearly the same landmass.
Mercury is almost perfectly tidally locked to the Sun. That’s why there is such a dramatic temperature gradient. Has nothing to do with atmosphere, because in our sense of the word it hasn’t got any.
Climate change... Guess Greta and the climate folks should go there and fix it.
You should see how much and how quickly my wife can change.
An individual point on Mercury has “no day and night.”
Mercury is gravitational locked to the sun so it presents the same face to the sun constantly. Mercury has a sun side and a dark side. The sun side is hot as hell and the dark side makes the antarctic seem a tropical paradise.
Our moon is also gravitational locked to the earth.