Looking at the sun and the moon from Mars, what are their sizes?

The sun on Mars looks very big. There are fewer suns seen on Mars than on Earth. The orbital radius of Mars is about 1.52 astronomical unit, the orbital radius of Earth is about 1 astronomical unit, and the solar radius is about 700,000 kilometers.

The average distance between Mars and the sun is 1.52AU (astronomical unit), and period of revolution has 687 Earth days, 1.88 Earth years (hereinafter referred to as years), or 668.6 Mars days.

The average Martian day is 24 hours, 39 minutes and 35.244 seconds, that is,1.05,438+0 Earth days. On earth, Mars is visible to the naked eye, and its brightness can reach -2.9, which is only darker than Venus, the moon and the sun, but it is darker than Jupiter most of the time.

It is impossible for human eyes to directly measure the size of the moon, the sun or any other celestial body. The main reason is that we completely lack depth perception when looking at the sky.

This means that when you look at the sky, all the stars and planets seem to be as far away from us. We call this celestial sphere: a huge sphere with the earth as the center and the stars on it. Ancient astronomers had the same problem. They think that all the stars are fixed on such a sphere, so the distance from us is the same. We now know that this is absolutely not the case, it is only the result of our poor eyesight. )