Earth and Mars have their own satellite . The difference is that there is only one satellite on Earth, that is the moon, and Mars has two satellites: Phobos and Phobos . So it sounds like Mars is better than Earth. But some things cannot be counted on quantity, but on quality. For example, Zhang San has a house in , Tangchen Yipin , and Li Si has two thatched houses in the countryside. In terms of quantity, Li Si’s houses are more than Zhang San, but in terms of substantial value?
Although the Earth only has the moon, the moon has a great influence. For example, the tides of the sea on the earth are affected by the gravity of the moon.
Both moons of Mars are very small planets. Even the diameter of Phopous is less than ten kilometers. It can even be said that even if the volumes of Phobos and Phobos are added together, they are not as big as the moon.
And, from the perspective of cosmic evolution, the final disappearance of Phobos will be something that humans can predict.
1. Captured satellite
Humans can almost confirm that Phobos and Phobos are actually planets passing by Mars. However, due to various celestial mechanics factors, Phobos and Phobos ended their wandering state and became Mars' satellites, and then orbited Mars in their respective orbits. Moreover, in terms of cycles, Phobos is also running much faster than the moon - almost every day, Phobos orbits Mars three times.
Assuming that humans can build observatorys on Mars, then, I believe that every day, Phobos can be seen moving in the sky of Mars.
Phobos has a surface area of about 1500 square kilometers. Its area is probably slightly larger than the built-up area of Shanghai, China. If humans can land on Phobos and can also get a private car to travel in Phobos, I believe that it will be possible to complete a global trip to Phobos in just one day.
In fact, the astronomy community is also very interested in Phobos. For example, regarding the origin of Phobos, some scholars believe that before Mars captured Phobos, Phobos might have come from other galaxies. If it is true, then in the future, humans can collect ores and soils on Phobos and then analyze them to determine the physical and chemical properties of the asteroid belt or planets outside the solar system.
2. Phobos will eventually die
In fact, based on the latest images, we can see that Phobos' terrain is more like a huge potato. In fact, smaller planets often have such irregular shapes, while larger planets are often relatively regular. Of course, if we look at it strictly, neither the Earth nor the Moon are standard stars. The shape of the earth is more like a duck pear.
Phobos, for humans, its lifespan has entered the countdown: because humans have calculated that due to many factors such as the force from Mars, Phobos' orbit is also shrinking. This means that Phobos is getting closer and closer to Mars. Therefore, in about 40 million years, Phobos will inevitably die - or Phobos will become a huge meteorite, , smashing on the ground of Mars, becoming one with Mars, and transforming into a mountain on Mars.
or eventually completely disintegrates, torn into a pile of fragments, and then evenly disperses, becoming the halo of Mars.
Assuming that there are creatures on Phobos, then, in 40 million years, they will really face the crisis of world destruction - after all, the planet is gone.
I just don’t know how many planets like Phobos have disappeared into the universe in the past years? The demise of Phobos in 40 million years also shows that even the planet will not exist forever.
