The Earth

The Planet Earth where we are living is the third planet in our solar system. The diameter of our Earth is about 12,756.3 km and its mass is about 48,690,000,000,000 tonnes. The average distance of the planet from the sun is about 149,600,000 km. Its rotation is about 0.99727 days and its orbit is of about 365.256 days. The average temperature of our planet is about +15 degree Celsius. And, the number of moons to our planet is one. Earth is a watery planet – 70 per cent of its surface appears blue – and the only one that can support life. From space, astronauts have observed cities, forest fires, roads, airports, dams and other large structures, such as Great Pyramid and the Great Wall of China. Our earth is the Home for the millions of species that includes Humans. It’s the only place in this universe where life is known to exist.