✔ 最佳答案
The earth WILL ultimately be destroyed, this is accepted as a fact by astronomers. The fate of the earth is linked to the fate of the sun. The sun is a main sequence yellow dwarf star. This means it is in the longest phase of its life - fusing hydrogen into helium, which will has been going on for almost 5 billion years. It is about half way through this phase. When it is over, it will expand, becoming a red giant. It will be far hotter than it is now, and its outer surface will extend beyond earth's current orbit. If the earth stays where it is, it will be consumed by the sun. If the earth drifts to a more remote orbit it will lose its water and atmosphere first. No matter what happens at this point, a red giant sun will only last a few million years, before becoming a very cool, tiny, white dwarf. This star will simply dissipate its heat and not be sufficient to sustain life.
If you mean can it be destroyed by collision with another object - it probably could, but it hasn't in the last 4.5 billion years, so probably will survive. That said, a catastrophic collision event occurs roughly every 500 million years, and one is overdue by many millions of years. Such an event could cause a mass extinction, like that which killed the dinosaurs.