Jörðin
Jörðin, also known as Earth, is the third planet from the Sun and the only known astronomical object to harbor life. It is the fifth-largest planet in the Solar System in terms of size and mass. Earth's equatorial diameter is approximately 12,742 kilometers, and its polar diameter is about 12,714 kilometers, resulting in an average radius of 6,371 kilometers. The planet's mass is about 5.97 × 10^24 kilograms.
Earth is primarily composed of iron (32.1%), oxygen (30.1%), silicon (15.1%), and magnesium (13.9%). Its surface is
Earth's axial tilt is responsible for the changing seasons. The planet's magnetic field, generated by its liquid
The planet's biosphere supports a diverse range of life forms, including humans. Earth's climate has been shaped