Venus is the second planet from the sun and is
also the hottest one with a daily temperature of 480 degrees Celsius.
This is due to the greenhouse effect caused by its thick atmosphere.
The heat from the sun enters the planet, but cannot escape. Venus
spins in the opposite fashion from that of Earth. In other words,
on Venus, the sun rises in the west and sets in the east. The
thick atmosphere is made up of mostly Carbon Dioxide and contains
sulfuric acid as well. Due
to this thick, heavy atmosphere, the pressure on Venus is 90 times
the pressure of Earth. All of these conditions make Venus a virtual
hell. Venus is 108 million kilometers away from the sun and its
year is equal to 225 Earth days. Earth is the third planet from
the sun and the only one in our solar system that can support
life. It is mid-sized and contains an atmosphere of mostly Nitrogen
and Oxygen. Oceans cover about 75% of its surface, with the remaining
part being land. Earth has four principle layers: the crust, mantle,
outer core and inner core. The Mantle is
composed of mostly iron and nickel. The inner core is solid, while
the outer core is liquid. Earth is approximately 150 million kilometers
away from the sun and has a year equal to 364.25 days. Earth has
one moon. Mars is the fourth planet from the sun. Mars is smaller
and colder than the Earth, but is still somewhat similar geographically
speaking. There is some evidence to suggest that life may have
existed on Mars but it is neither substantial nor credible yet.
Mars appears to be red because some of the iron reacted with small
amounts of oxygen making it rust. Frost and ice cover parts of
the surface and there is thought to be an underground reservoir
of ice. This ice could contain small forms of life, but it is
unlikely. Mars is 228 million kilometers away from the sun and
its length of year is equal to 687 days. Mars also has 2 moons.