Gravity measurements have indeed suggested that there might be a layer of molten rock deep within the Moon. This layer, often referred to as a partially molten zone, lies between the Moon's rocky mantle and its solid metallic core.
While the moon's surface appears cold and lifeless, its interior may be surprisingly active. This molten layer could be a remnant from the Moon's formation billions of years ago when it was much hotter. Or, it could be a result of ongoing processes within the Moon's interior, such as radioactive decay.
Why is this discovery significant?
- Geologic activity: A partially molten layer could indicate that the Moon's geology is still active, even after billions of years.
- Volcanic history: This layer might have been responsible for volcanic eruptions that created the dark, smooth plains known as maria.
- Internal structure: Understanding the Moon's internal structure can help us learn more about its formation and evolution.
While scientists have strong evidence for a partially molten layer, there are still many questions to be answered. Further research, including future lunar missions, will help us delve deeper into the Moon's mysterious interior.