Earth is known as the Blue Planet as 2/3 of its surface is covered by ocean. Earth's atmosphere is rich in life sustaining Oxygen and Nitrogen. Earth rotates around its axis at over 1000 mph.
Venus is the second planet from the sun and is extremely hot. It has a toxic atmosphere which would crush you in seconds. 1 day on Venus is same as 241 Earth days. It is often brighter than anything else in the sky and has claimed many UFO reports.
The closest planet to the sun is Mercury, it's only a bit bigger than the moon. This scorched planet can reech 450 C in the day and -200 at night.