Planet Earth is the third planet from the sun in our solar system, and the only known planet to support life. It is a terrestrial planet, meaning that it is composed primarily of rock or metal, with a thin layer of atmosphere and large bodies of liquid water on its surface.
Earth has a diameter of approximately 12,742 kilometers (7,918 miles) and a mass of about 5.97 x 10^24 kilograms. It is located about 149.6 million kilometers (92.96 million miles) away from the sun, and takes about 365.25 days to complete one orbit around it.
The Earth’s atmosphere is composed primarily of nitrogen (78%) and oxygen (21%), with trace amounts of other gases such as carbon dioxide, methane, and ozone. This atmosphere protects the planet from harmful solar radiation and helps to regulate the Earth’s temperature.
The Earth is home to a diverse array of plant and animal species, with an estimated 8.7 million species on the planet. It is also home to a wide range of geological features, including mountains, valleys, oceans, and deserts.
The study of the Earth and its systems is known as Earth science, and includes fields such as geology, meteorology, and oceanography. Understanding the Earth and its complex systems is crucial for addressing a wide range of environmental and social challenges facing the planet, such as climate change, resource management, and biodiversity conservation.