Nearest Planets

Check out the video Relative Size of Venus and Mars to see how these two planets compare.
Explore 10.1 The Nearest Planets: An Overview to learn about Venus, with its impenetrable cloud cover, and Mars, with its dark markings, polar caps, and intriguing history of early speculation about intelligent life.
The planet Venus provides an interesting perspective on what can happen when greenhouse gases start to dominate the atmosphere, and it isn’t a pretty picture. Watch the humorous and informative video, Why is Venus So Horrible? to learn how Earth will eventually become a desolate wasteland like Venus is.
Humanity has been fascinated with the planet Mars since the dawn of civilization. Watch the video Mars in Myth and Legend to see numerous examples of how Mars has captivated public interest.
Now that we’ve seen some non-scientific views on the red planet, let’s step back again in history and walk through the development of scientific thought on Mars. Watch this 10-min teacher video.