Earth
Earth: Our Home Planet Earth is the third planet from the Sun and the only known celestial body to support life. It's the only place in the universe where we have confirmed that liquid water exists, and this water, along with a range of other conditions, allows for life to thrive. Below is an overview of key aspects of our planet: 1. Basic Facts: Diameter: About 12,742 km (7,918 miles) at the equator. Circumference: Approximately 40,075 km (24,901 miles) around the equator. Mass: Around 5.97 × 10²⁴ kg. Surface Area: About 510 million square kilometers (197 million square miles). Age: Estimated at around 4.5 billion years. 2. Structure of Earth: Earth has multiple layers, each with distinct characteristics: Crust: The Earth's outer shell, composed of solid rock. It's broken into tectonic plates. Mantle: Beneath the crust, made of semi-solid rock that can flow very slowly over long periods. Outer Core: A layer of liquid metal, primarily iron...