system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
How big is the Earth?
gpt
The Earth has a radius of 3,963 miles or 6,378 kilometers, and accounting for the bulge at the equator that causes the planet to not have a perfectly spherical shape, using the Earth's polar radius at 3,950 miles, or 6,356 km, the equatorial circumference of Earth is about 24,901 miles or 40,075 km. Except from pole to pole as the meridional circumference is only 24,860 miles, or 40,008 km, around. This makes Earth just slightly bigger than Venus and much bigger than Mars, but much smaller in comparison to the gas Giants.