Тема: Mars Planet

Like Mercury, Venus and Earth, Mars is mostly rock and metal. Mountains and craters scar the rugged terrain. The dust, an iron oxide, gives the planet its reddish cast.

Zuber and her colleagues also analyzed Mars 's much larger northern polar cap. The ice cap is cut by deep troughs and chasms; some of these depressions extend down over a mile to the base of the planet 's crust.

Like the other terrestrial planets -- Venus, Earth and Mars -- Mercury is made mostly of rock and metal. This small world is scarred by craters and...
The thick cloud cover around Venus rotates much faster than the planet itself -- once every four...

Kepler concluded that the orbit of Mars was an ellipse with the Sun in one of its foci (a result which when extended to all the planets is now called "Kepler's First Law"), and that a line joining the planet to the Sun swept out equal areas in...

The third planet from the sun is, in scientific terms, quite similar to the first two.
...the four planets of the inner solar system (Mercury , Venus , Earth and Mars ) all share rock and metal as their primary ingredients. Each of these so-called...

One says they broke off of a mother planet that existed between Mars and Jupiter.