Mars has always fascinated people. Its red, fiery appearance is mysterious and intriguing. Many sci-fi stories talked about the ancient race of Martians. In fact with new data coming from space probes, a growing number of scientists now believe that...

Mercury is the closest planet to the Sun, and the second-smallest planet in the solar system! It is about the same size as our Moon and their cratered surfaces actually have much in common. Mercury travels around the Sun faster than any other...

Neptune is the eighth planet from the sun, and the outermost gas giant in our solar system. Neptune''s atmosphere has the highest wind speeds in the solar system, up to 2000 km/h. The planet has large, dark ovals on its surface which astronomers...