Actual Size Of Earth?

With a radius of 3,760 miles (6,052 kilometers), Venus is roughly the same size as Earth — just slightly smaller.

From an average distance of 67 million miles (108 million kilometers), Venus is 0.7 astronomical units away from the Sun. One astronomical unit (abbreviated as AU), is the dista...

The Earth spins at the speed of 1,036 miles per hour (1,667 kilometres per hour).

• The tides can slow the Earth's rotation speed and add about 2.3 milliseconds to our day every century.
• Weather systems can also change the Earth's rotation.

Mercury's highly eccentric, egg-shaped orbit takes the planet as close as 29 million miles (47 million kilometers) and as far as 43 million miles (70 million kilometers) from the Sun. It speeds around the Sun every 88 days, traveling through space at nearly 29 miles (47 kilometers) per second, fa...