Transcript MARS - LICEO G.BRUNO

Mars is a terrestrial planet
because it has got:
-a crust
-a mantle
-a core
The core of Mars is composed by iron and it extends for a ray
of about 1480 km. probably the core is not liquid, but at
viscous status.
The colour of the crust is red, that’s why Mars
is also called The Red Planet . This particular
colour is caused by iron oxide. Iron oxides are
chemical compounds composed of iron and
oxygen.
The surface presents a lot of
vulcanic formations,
valleys, polar ice caps and
sandy desert. An
important vulcan of Mars
is Olympus Mons, it is the
highest vulcan (22 km) in
the Solar System. What is
more it is presumed that
a long time ago there was
water on Mars, which has
now totally disappeared.
The surface gravity, g, of an astronomical or
other object is the gravitational acceleration
experienced at its surface. Surface gravity is
measured in units of acceleration, which, in
the SI system, are meters per second squared.
It may also be expressed as a multiple of the
Earth's standard surface gravity, g = 9.80665
m/s^2.
The gravity on Mars is much lower than it is
here on Earth, 62% lower to be more precise.
That means that Martian gravity is 38% of
Earth’s. A person weighing 100 kg here would
tip the scales at 38 kg there. Mars is smaller
than Earth in all the factors that determine the
gravity of a planet. Mass, density, and size are
a few of them.
The atmosphere of Mars is less than 1% of
Earth’s, so it does not protect the planet from
the Sun’s radiation. It consists of 95% carbon
dioxide, 3% nitrogen, 1.6% argon, and the
remainder is trace amounts of oxygen, water
vapor, and other gases.
Also, it is constantly filled with small particles
of dust(mainly iron oxide), which give Mars its
reddish hue. Scientist believe that the
atmosphere of Mars is so negligible because
the planet lost its magnetosphere about 4
billion years ago.
Mars has two relatively
small natural moons:
-Phobos ;
-Deimos.
In about 50 million
years they will either
crash into Mars’
surface or break up
into a ring structure
around the planet.
Mars is the fourth planet in the Solar System
and being much farther from the Sun respect
to Earth, so it takes more time to make a
complete circle around it, about two Earth
years.
Mars was the Roman god of war and
also an agricultural guardian, a
combination characteristic of
early Rome. He was second in
importance only to Jupiter, and
he was the most prominent of
the military gods worshipped by
the Roman legions. His festivals
were held in March, the month
named after him, and in October,
which began and ended the
season for military campaigning
and farming.
It has been an important part of the space exploration
programs of Russia, the Soviet Union, the United
States, Europe, and Japan. Dozens of robotic
spacecraft, including orbiters, landers, and rovers, have
been launched toward Mars since the 1960s. These
missions were aimed at gathering data about current
conditions and answering questions about the history
of Mars as well as a preparation for a possible human
mission to Mars. The questions raised by the scientific
community are expected to not only give a better
appreciation of the red planet but also yield further
insight into the past, and possible future, of Earth.
• http://it.wikipedia.org
• http://en.wikipedia.org
• http://www.rpi.edu/research/magazine/fall20
07/argon-2.html
• http://explanet.info/Chapter06.htm
Alessandri Daniele
Amato Matteo
Pesce Riccardo
Schifanella Lorenzo
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