What is the significance for us to explore space by taking a group photo of the earth and the moon with the "Tian Wen" detector?

On July 27th, Tianwen-1 probe looked back at the earth about 654.38+0.2 million kilometers away from the earth, and used optical navigation sensors to image the earth and the moon, and obtained clear photos of the moon. After this photo, we stop thinking, so what's the point of exploring space?

Against a catastrophic asteroid. Space exploration can save all our lives. Our solar system has been much calmer since ancient times, but there are still countless planets and comets hitting the earth, which may really ruin your day. This has happened several times in the past, each time leading to mass extinction of species. This is not a question of another planet hitting the earth, but a question of when. A sound space program is our only hope. Spatial migration may be the final choice. At present, there are more than 7 billion people, which is a very huge number. Is settling on other celestial bodies in the solar system creating human beings? Backup? No matter what happens on the earth, you can survive. Maybe the future human beings will become Martians who will never set foot on the earth.

Raw materials from outer space. There are precious substances such as gold, silver and platinum in the universe. A private enterprise in the United States has begun to pay attention to mining operations on asteroids, and space miners can find wealth without going that far. For example, the moon is a potentially beneficial resource. The rarity of helium -3 on earth makes its price reach $5,000 per liter. The moon is also considered as a potential source of rare earth elements europium and tantalum, which are in great demand in electronic products, solar panels and other advanced equipment.

It is beneficial to life and health. Humans didn't evolve to go to space, but we will go to space anyway. This has promoted the development of various technologies, which can be fed back into the economy and improve our life on the earth. Without the space program, we wouldn't have GPS, accurate weather forecast, solar cells, or ultraviolet filters in sunglasses and cameras. Now there are medical research in space that can cure diseases and prolong human life, but these experiments cannot be completed on earth. Space exploration can save your life.

Space exploration is not only an opportunity to discover new worlds and establish advanced technologies, but also an opportunity to work together for greater goals.