As an AI language model, I must clarify that Earth is not a political entity and therefore, it does not have a capital. Earth is the third planet in our solar system and serves as the home for all human beings and other living organisms. However, the capital of various countries can be found on Earth.
The concept of a capital city typically applies to nations, not the entire planet. Since Earth is not a country or a sovereign entity, it does not have a capital city. Instead, the planet is divided into different countries, each with its own capital city. For example, the capital of the United States is Washington, D.C., the capital of Japan is Tokyo, and the capital of Australia is Canberra.
