Some problems about Mars

1. Mars is farther from the sun than the earth, so the surface temperature is lower than the earth. Moreover, the Martian atmosphere is thin and dry, with poor heat insulation performance, and the temperature difference between day and night is about 100℃. Near the equator, the temperature can reach 20℃ during the day and suddenly drop to about -80℃ at night. The temperature at the poles of Mars is even lower, with the lowest temperature reaching-139℃.

2. Yes

3. Less than 3 1 year

On August 27th this year, Mars will run to the closest position to the Earth in the past 60,000 years. By then, the distance between Mars and the Earth will be about 55.76 million kilometers. Next time, two planetary brothers are so close, it will take tens of thousands of years. Because Mars is closest to the Earth, this year is not only the best time to launch a Mars probe, but also an excellent opportunity for ordinary astronomy enthusiasts to observe Mars. At the end of August this year, the brightness of Mars will reach -3, about 75 times that of the darkest time of Mars. The size of Mars observed by naked eyes will be 2.5 times that of today. Astronomy lovers can witness the hazy landscape on the red planet Mars with better telescopes.