Green House affect on Venus

Without the greenhouse effect, the surface of venus would have a noontime temperature of 465 K. Because of the greenhouse effect, it is acutually a sweltering 750K, hotter than the hottest spot on Mercury. Prevents  liquid water form existing on Venus. Water that has evaporated has drifted into space.

Slightly larger than the moon

Craters on Mercury: craters are less densely packed, crater walls are generally not as high as those on the moon.(due to stronger gravity), there are extensive intercrater plains but not like maria, and these plains are lighter in color and not as flat as on the moon.

Mercury has numerous long cliffs called scarps, believed to have formed when the planet's core/interior cooled and shrank, causing the surface to crack.

This is the impact crater whose diameter is comparable to the radius of the planet Mercury itself.

This crater has rings of mountains surrounding it, similar to Orientale Basin on our moon.

Opposite side buckling to Caloris impact.

The magellan spacecraft, in an orbit around Venus, was able to "see through" the thick clouds using radar, giving us the best viewof our sister planet.

There are rift valleys as large as the East African Rift (the largest on Earth).

These "cow pie" volcanoes are common on Venus. They are a few KM wide with a tiny crater in the top. Similar volcanoes occur on the deep ocean floors of Earth.

Where external pressures are too great for explosive volcanoism, small volcanoes seem to form domes rather than cones.

The craters found on Venus tend to be in clusters.

This suggests that they were formed from a large single piece of falling debris that was broken up by the Venusian atmospere.

Polar Ice Cap (frozen carbon dioxide i.e. dry ice) They grow and diminish according to the season

Lowlands (rollng plains) in norther hemisphere. They are less cratered.

Highlands (plateaus, mountains) in southern hemisphere. They are heavily cratered.

The martian terrain includes broad towering volcanoes, vast windswept plains, and enormous canyons.

Valles Marineris - this canyon is 10X longer and 5X deeper than the Grand Canyon

Most of these craters are found in the Southern Hemisphere, suggesting that the northern vastness has been resurfaced.

Largest Volcano in the entire solar system.

It covers an area the size of Missouri and rises three times higher than Mount Everest.

The martian surface has some unusual features.

In the same region of Mars where the face was found, other erosion features also appear to be pyramids and skulls.

The crater and its interior features combine to give the impression of a "happy face"