Comets are unsteady body,
which usually include little not many kilometers in distance. When you are at a
great distance from the Sun are down, its small core, which can vary from a few
hundred meters to about 10 km. only reflects light. Near the sun the core is
surrounded by a "head", the comma, whose diameter can be up to 30,000
km. The coma is composed of gas emerged from the nucleus by sublimation and
dust. Its production increases severely as we advance the Sun.
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Wednesday, June 13, 2012
Tuesday, June 12, 2012
Uranus
From Earth the Uranus in
study by a telescope. Within walking distance of the cloud tops and a pressure
of 0.4 times that recorded on Earth at sea level the temperature is -214 ° C.
The chemical composition of the uppermost layer of the atmosphere is mostly
hydrogen gas while the bulk of Uranus is composed of heavy material. Uranus
should be composed predominantly water ice, ammonia and methane compounds that
because the most abundant elements (hydrogen, oxygen, carbon and nitrogen) are
the usual ice in the solar system. Its south pole exposed to the sun for
decades seemed stained with a reddish tinge; a series of concentric waves could
be clearly seen in the images processed by the computer and handfuls high
luminous clouds swept from east to west by winds of up to 500 km / hour.
The Saturn
This is the second biggest
in our solar system and the only planet whose average mass does not exceed that
of water so if there is a sea that surround Saturn could soar.
At Saturn from a modern
telescope in 1610, Galileo draw it as a globe bounded by two smaller ones as a
head with large ears (the first one who came up with the Mickey Mouse logo).
Galileo thought it was moons but when two years later reviewed the planet had
disappeared. Later in 1655 the Dutch astronomer Christian Huygens discovered
Saturn having had a satellite orbiting Titan, announced that the planet should
be surrounded by an equatorial ring.
The planet Mars
After our blue planet
Earth from the Sun, The Mars is the fourth planet. It is known since historic
times as the "Red Planet" because of its coloration, which stimulate
much interest. His name is the god of war according to the Greco-Roman mythology.
Mars is one of the
planets most fascinated us throughout history, the possibility that harbored
life due to their similarities with our planet, has led to weave thousands of
stories about and a great hope of finding microscopic life today, in these our
days in which technology allows us to almost touch this dream with your hands.
Enlarge the probability of an asteroid crash with Earth
Scientists at the
Cardiff Centre of Astrobiology, UK, have developed a mathematical model that
confirms that currently is experience our solar system called the extensive hydroplane,
which increase the chances of an asteroid collide with Earth. An asteroid is a
rocky body that orbits the Sun Becomes meteorite when it enters Earth's
atmosphere. In astronomy, is called the huge hydroplane in the middle of the
region in which they are most of the stars of a flattened galaxy, as twist galaxies.
The moon
The moon is the most
important desire of each amateur. The additional and superior we appreciate it,
the additional we desire to identify. Its closeness make us look elder than it
is, and moving quickly across the sky, where it actually runs about 12 ° per
day, or about half a degree per hour (its apparent diameter).
It appears that, the unfruitful
planetary shell has not changed during history known to guy because if we
compare the first known maps with today, however elementary they may be does
not differ in their details.
Inner symphony of the Earth
Internal Structure of the Earth. Thanks to
the seismically, we know how to be the interior of our planet, the core at
its center, consists especially of iron possibly solid, liquid outer core
would, and then the mantle would happen a thin crust.
Fascinating structure of a typhoon seen and
photographed from space by the crew of the Space Shuttle. In this extraordinary
image of an event in Earth's atmosphere as comparable to that of a galaxy,
Typhoon Odessa shows his eye despite being scary, fascinating. Image top right:
Extraordinary photography Kliuchevskoi Volcano in Russia, obtained from space
by the Shuttle.
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