Our sky looks blue because our atmosphere scatters the blue light waves but Mercury doesn’t have any atmosphere so the sky is always just black even during the day when the sun is out. Also because there is no atmosphere it gets 800 degrees during the day and -290 degrees at night. Also my friend Benji got to see a SpaceX rocket launch and his mom took this picture (Sam, 9).
Mercury is the fastest planet in our solar system. It goes around the sun 4 times faster than the earth so a year on Mercury is 88 Earth days. But Mercury rotates really slow so a day on Mercury lasts for 59 Earth days. I wrote about Mercury on our blog when I was 7 but I don’t think I knew what I was talking about (Joel, 13).