Mars the Red Planet even though taking a better look at it it’s quite colorful planet. In English, Mars carries a name of the Roman god of war, It is the second smallest terrestrial planet with a thin atmosphere, having surface features reminiscent both of the impact craters of the Moon and the valleys, deserts, and polar ice caps of Earth. In our solar system,but that doesn’t mean that it’s not a big place. Mars is the site of Olympus Mons, the largest volcano and second-highest known mountain in the Solar System, and of Valles Marineris, one of the largest canyons in the Solar System. The smooth Borealis basin in the northern hemisphere covers 40% of the planet and may be a giant impact feature. Mars has two moons, Phobos and Deimos, which are small and irregularly shaped. These may be captured asteroids, similar to 5261 Eureka, a Mars trojan. It has the similar solid surface area (Total and Solid: 144,800,000 km2) as Earth (Solid : 148,940,000 km2, Total : 510,072,000 km2). If we include the oceans it has about half the diameter of Earth (Mars : 6,779 km, Earth : 12,742 km), also you can fit two of them in Siberia. There are ongoing investigations assessing the past habitability potential of Mars, as well as the possibility of extant life. So then what if, Mars became a moon of earth let’s say it suddenly for some reason started drifting towards the earth when it arrived here it would cause quite a few number of problems and changes in general. So first of all since Mars would be closer to the Sun its surface would heat up causing the temperature to go up by a fair number of Celsius and causing the thickness of the atmosphere to change a bit as well as the whole landscape of Mars polar ice caps made out of carbon dioxide may even disappear. At some point because of the temperature change now when it reaches Earth’s moon would likely be ejected causing it to fly into outer space it is also not certain whether or not it will settle into orbit or crash into Earth, but let’s say it settles at around 400,000 kilometers of a distance from Earth similar to our Moon 368,092 kilometers. Now as of Mars had settle into Earth’s orbit then Mars would appear double the size of our moon because it has double the diameter. It is well quite reflective maybe even more so than our Moon even during a very dark night away from light pollution. Moon provides quite a good shine and can create a shadow the shine is also whitish and blueish but with Mars as our moon nights would appear a bit brighter with an interesting reddish and orange tinge to it. Now because Mars is still quite big and has somewhat strong gravity it won’t totally be the moon of Earth rather Earth’s and Mars would create a very center of mass which both objects would orbit around, but the earth would be just more dominant. It also may cause Mars to be finally locked so it would always show the similar faith to earth so, because of its gravity tidal forces of Mars could cause tidal heating a verse making the temperature rise here likely by a few Celsius which could melt some of the ice on earth. This will cause the sea level to rise just a bit, still cities and the coasts would be in some trouble but not only that time as well would be much bigger and tsunamis would more frequent. In the long run could cause some serious damage to the land now that is very bad but there are some good things that would come with Mars.
First of all since, it will be so close studying Mars would become much easier. Sending a human over there would be very much possible communicating with these rumors. Humans would be done with a few seconds of delay unlike a Martian real case which it takes few minutes for a signal to reach Mars because it is very far away so terraforming Mars and studying its ancient landscape would be a lot easier, maybe we would even find some simple form of life and we explored it a lot more and it could become a second home to us. Still it is not very predictable how Mars would change with the temperature rise and will it affect the landscape a lot but for sure humans could make a lot more out of it than now, so all in all marshes are very promising targets one of the least hostile objects in the solar system. Now it won’t actually become our moon but if it were to become our moon it would have its upside as well as it’s down.