Prithvi, also known as Earth, is the third planet from the Sun in our solar system. It is the only known planet to support life, featuring diverse ecosystems, climates, and landscapes. Prithvi has a diameter of about 12,742 kilometers and is primarily composed of rock and metal. The planet is surrounded by an atmosphere rich in nitrogen and oxygen, which is essential for living organisms. Prithvi's surface is covered by approximately 71% water, mainly in the form of oceans. The planet's rotation on its axis creates day and night, while its orbit around the Sun results in seasonal changes.