For centuries, humans have made great efforts to study the Moon. Galileo, the Italian astronomer, noticed the mountains and lands on the Moon with a telescope(望远镜). In 1969, the US Apollo 11 project marked the first time that humans set foot on the satellite. Recently, China' s Chang'e 6 brought back the rocks and soil from the far side of the Moon for the first time in history. You may wonder: what is the value of exploring the Moon?
Many scientists believe that the Moon was made of the rocks and dust from the baby Earth. When the solar system(系统) just formed. a Mars-sized object crashed into the Earth. The force of the crash was so great that it sent materials from the Earth, and from the object that hit it, back into the space. Some of the rocks and dust stuck together and created the Moon.
Those materials on the Moon's surface(表面) have stayed unchanged for over three billion(十亿) years, since it does not have an Earth-like atmosphere. This simple fact makes our Moon a time capsule, which allows scientists to uncover the Earth's past.
It is also about our future. In the last two decades, water was discovered on the Moon. It may help future humans look for drinkable water, breathable air, and rocket fuel outside the Earth. Besides, the Moon is a proper place to test technologies required for deep space exploration, including sending humans to Mars.
Considering the important role that moon exploration plays in scientific research and human future, scientists suggest that human activity on the Moon should avoid bringing harm to its environment.
