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Study the bar graph. Venus is almost twice as far from the Sun as Mercury, yet it is the hottest planet. The best reason is that Venus
So far, Earth is the only planet in our Solar System known to support life.
Earth is about 150 million km from the Sun. Mars is about 1.52 times as far from the Sun as Earth. How far is Mars from the Sun (in million km)?
The figure shows four planets W, X, Y and Z (drawn to scale) and the habitable zone around the Sun in a simple model. (a) Which planet lies inside the habitable zone? (b) What would happen to surface water on planet W and on planet Z? (c) Why is it important that the habitable zone is neither too close nor too far from the Sun?
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