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 |  planets  8 planets of the solar system (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) and their satellites. |  sun The Sun is in 2/3 of the galactic center towards the edge, at a distance of 30 000 light years of the center. The Sun moves in a speed of 230 km/s around this galactic center during its revolution which it makes in 250 million years. |  galaxies The Galaxy, it is the name datum in our galaxy, it is an enormous spiral wheel of stars, a diameter of 100 000 light years. What appears of the Earth, it is a white continuous band called the Milky Way. |  bigbang There is 15 billion years a tremendous explosion of light gives birth to the space, in time, in the matter, a chaos burning with an inconceivable heat, a formless porridge which is going to swell, to extend in all the directions and to cool quite slowly. |  quotations Some quotations of big men (Aristotle, Galilee, Newton, Plato, Laplace, Einstein). |  links Some external links concerning the astronomy.

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|  |  dwarf planets According to the definition which was approved on August 24th, 2006, during the 26th General assembly of the UAI ( International Astronomical Union), three bodies reach the status of dwarfish planet: Pluto, Eris, and Ceres. Others objects should soon join this nomenclature. |  solar system The solar system is really much more complex if we take into account all the objects being a part of the system. A considerable number of objects is in the  Kuiper belt and still beyond in the cloud of Oort. |  heaps Heap of galaxies are the biggest structures of the Universe. They are constituted by hundreds of galaxies connected together by their own gravitational attraction. Between the galaxies we find some material constituted by warm gas there, forming a plasma, the temperature of which reaches 10 to 100 million degrees. |  comets Besides planets, satellites and asteroids, the solar system contains comets (hair in Greek). The roaming comets originate in the depths of the space in several years lights. The number of periodic comets is of the order of 2000. |  biographies Some biographies, Einstein, Baade, Lyot, Hale, Hubble, Shapley, Laplace, Maxwell, Newton, Herschel, Kepler, Galilee, Aristotle... |  glossary Definition of certain words or expressions used on this site in link with the astronomy.

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| articles Christian's articles in link with the astronomy (history of the Earth, the electron, the neutrons stars, the rings of Saturn, the particles, the threat of asteroids, journey in the universe up to the atom)... |  exoplanets Exoplanets are situated by definition outside our solar system. Seen the large number of existing galaxies and the large number of stars which they contain, the search for these exoplanets or extra solar planets, is unlimited. |  constellations A constellation is a group of stars of the sky which enough close relations looked the appearance imagination of a figure onto the sky. |  nebulas Of the Latin 'nebula' which wants to say cloud, clouds of gas and dusts in the middle of stars, nebulas are at the same moment active crèches and cemeteries of stars. These magnificence of the sky are lit by the stars which they contain or by stars situated behind them. |  telescopes A telescope is constituted by a mirror which concentrates the light resulting from the observed celestial body and from the objective which supplies an enlarged image with it. The increase and the luminosity are proportional on the surface of the mirror. The presence of the ground atmosphere limits the performances of a telescope. It is to mitigate this inconvenience that spatial telescopes were placed in the space. |  bibliographies Some interesting books in link with the astronomy. |  faq Some simple answers concerning the universe which surrounds us.

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| asteroids Numerous small rocky called bodies asteroids are present in the solar system, an important part of them circulate in a ring, between the orbit of Mars and that of Jupiter in 2 to 4 UA.

 |  rings The rings of Saturn are one of more beautiful and of the most surprising spectacles of the solar system. That is why on July 1st, 2004, the spaceship Cassini-Huygens reduced its speed to be captured by the gravity of Saturn to enter in orbit with this one. |  stars A star is a celestial body similar to the Sun, which shines thanks to nuclear reactions which occur in its center. |  multiverse The universe is an expanding cosmic bubble. This bubble creates a new bubble which produces it the others etc.... Quantities of the other universes which give birth to the other universes, it is an interesting idea but which remain at the moment very speculative. |  space probes These instruments that are space probes, perceive in the detail the forms and the composition of objects of the distant regions and offer us exceptional sights of an unequalled precision. |  elements The most usual and practical presentation of the diverse chemical elements is the periodic board of elements also called Table of Mendeleyev. The atoms which have the same number of protons but a number different from neutrons are called isotopes. |  aurora A polar aurora called aurora borealis in the north hemisphere and the aurora australis in the southern hemisphere, is a brilliant phenomenon characterized by sorts of veils extremely colored in the night-sky.

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Articles

      

         

News

      

automatic translation        
       
The rings of Saturn The rings of Saturn are constituted by uncountable particles, each on an appropriate orbit, of silicates, oxide of iron and particles of ice of a size varying of the speck of dust in some meters. [See Christian Simoes's article].
Surprising spectacles of the solar system are one of beautiful and furthermore. That is why on July 1st on 2004, the spaceship Cassini-Huygens reduced its speed to be captured by the gravity of Saturn to enter in orbit with this one. The spaceship will investigate until 2008 the planet, its moons mysterious, its stunning rings and its magnetic environment complex. Cassini has to make 74 rotations around the planet, to move closer to Titan and the other icy moons of Saturn. The most beautiful spectacles are the one all the same that propose us the rings of Saturn...		  

author : Christian Simoes

date : 04/02/2007

 

  

       
Particles in the biochemical life At the vague beginning, an energy creates billions of billion billion particles and antiparticles [See Christian Simoes's article].  

author : Christian Simoes

date : 15/12/2004

  

The microscopic world and the macroscopic world are gathered in the evolution of the universe, because the infinitesimal generated the infinitely big, the universe sprang of almost nothing. At the vague beginning, an energy creates billions of billion billion particles and of virtual antiparticles, which are going to leave the opaque world of shadows...
    
       
The electron The electron is rather a sort of heavy electric point, about which nobody very well knows either where it is, nor where it goes [See Christian Simoes's article].  

author : Christian Simoes

see " the universe of particles " of Michel CROZON

  

We can think that it is a ball in charge of electrically but it is a badly adapted image, it is a wave
It is rather a sort of heavy electric point, about which nobody very well knows either where it is, nor where it goes. It turns on itself as a top without being able to stop and it presents a certain shape of very discreet complicity...		    
       
The history of the Earth in 24 H Of the disk solar proto in today in one scale of time of 24 hours [See Christian Simoes's article].  

author : Christian Simoes

date : 28/03/2004 

  

There is 4,55 billion years, dusts of ancient huge stars constitute the nebula solar proto in rotation around what will become our Sun. The earth is not constituted yet. The disk which surrounds the primal sun warms up from its birth, its size reaches 200 UA ( astronomical unity). It begins to solidify and atoms stick some to the others...    
       
The star with neutrons To represent itself more easily the state of the matter inside stars with neutrons, it is instructive to imagine an experience [See Christian Simoes's article].  

author : Christian Simoes

lire "Le destin des étoiles" de George GREENSTEIN

  

The average density of a star with neutrons is about the one of the atomic nucleus. At this moment, there is not a vacuum anymore. Stars with neutrons, unlike planets and common stars, possess super powerful magnetic fields.    
       
Asteroid, the threat... An asteroid 16 km in diameter would provoke a 200 km crater, it once arrives every 100 million years [See Christian Simoes's article].  

author : Christian Simoes

date : 15/12/2001

 

  

 
The space is far from being empty, it is sprinkled with dusts and with matter dating the creation of the solar system. Asteroids and comets, metal and rocky objects, move in a vertiginous speed around planets and of our Sun. Sometimes their orbits cross that of the planet or Earth so provoking a collision...    
       

Notion of the distances Here is presented here a journey in the Universe of the biggest to the smallest distance. This notion of distance begins in 14 billion years light (size of the Universe) and it finished in 10 atoms measures (size of the quark). [See Christian Simoes's article].
The visible universe has a beam of 14 billion years light simply because it is old about 14 billion years. The real size of the universe has to be more important than that of the visible universe, but we shall not go more far...

  

author : Christian Simoes

date : 13/10/2006

  

         
Concept of entropy Entropy, uncertainty, disorder, complexity, thus appear as adversities of the same concept. Under the one or other one of these forms, the entropy is associated with the notion of probability. It characterizes not an object in itself, but the knowledge which we have of it and our possibilities of making forecasts. It thus has a character at the same moment objective and subjective. [See Christian Simoes's article].
A cup which breaks itself never returns there back, a body which dies will not live again any more, the files of one hard disk will not find any more the initial order. Although these cases purely theoretical are possible, the probability that it arrives is of the order of one on billions of billions.
The total entropy of an isolated system always has to increase, its disorder always has to grow, it is the second principle of the thermodynamics...		  

author : Christian Simoes

date : 21/02/2007

  

         

Eclipse of the Moon The eclipses of the Moon are observable at the same moments under the same aspect since all the places on the surface of the Earth, since the Moon is over the horizon and since the sky is not masked by clouds. [See Christian Simoes's article].
The eclipses of the Moon are eclipses of the Moon by the earth while the eclipses of Sun are eclipses of the Sun by the Moon.
This frequently observed heavenly concordance allowed the man antique to become aware of the roundness of the Earth...

  

author : Christian Simoes

date : 04/03/2007

 		  

         

Black matter In astrophysics, the black matter (or matter sinks) indicates the apparently undetectable matter. Various hypotheses were emitted and investigated on the composition of this hypothetical black matter. [See Christian Simoes's article].
More and more astrophysicists consider that this black matter does not exist and rather than to try to explain the abnormalities by a matter even unobservable, it would be according to them more sensible in revising our laws of the physics...

  

author : Christian Simoes

date : 17/09/2007

 		  

         

Vision egocentric And if the Universe was only one blazing illusion? A black labyrinth splashed with images ghosts, papered with strange virtual mirrors... If by the magic of the structure of the cosmos celestial bodies by billions which we perceive in the top were as well no as the reflections repeated by some stars only? [See Christian Simoes's article]
Our vision egocentric person is worsened since the scientific era. Effectively, more the science explains the Universe which surrounds us until the appearance of the life and more the humanity seems to be a phenomenon commonplace. The man who was situated in the center of the creation, on an earth blessed by the Gods...

  

author : Christian Simoes

date : 11/09/2002

 		  

Une chondrite carbonée : la météorite de Murchinson
         

Sputnik  Sputnik 1 (Спутник 1, Literally "companion" in Russian, is a "satellite") was the first artificial satellite. It was launched on October 4th, 1957 at 7:28 pm UTC by the USSR, with initials ПС-1 (PS-1, for Простейший Спутник-1 or " Elementary Satellite 1 ") of the Cosmodrome of Baïkonour. [See the article of Christian Simoes]
On October 4th, 1957 at 7:28 pm, one fused Semiorka unsticks from Baïkonour, taking a small sphere of aluminum 58 centimeters in diameter, weighing 83,6 kg and endowed of four antennas, it is Sputnik 1. Sputnik turns around the Earth it 97 minutes...

  

author : Christian Simoes

date : 22/09/2007

 		  

         

Volcanoes We count approximately 1 500 active ground volcanoes of which about sixty enter eruption every year. The word "volcano" comes from Vulcano, one of Aeolian Islands named in honour of Red admiral, the Roman god of the fire. [See Christian Simoes's article]
Formed of three parts: a reservoir of magma in depth, one or some volcanic mouths can have important consequences on the evolution of the humanity...

  

author : Christian Simoes

date : 22/09/2007

 		  

         

Are we alone...  To answer this question it is necessary to take into account the chances which we have to discover the life somewhere else. [See Christian Simoes's article]
The proof of the extraterrestrial life can arrive in one minute or in several million years but the life on Earth has 5 billion years in front of her and the present intelligence on Earth at this moment there, will see these other lives...

  

author : Christian Simoes

date : 31/10/2007

 		  

         

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 |  planets  8 planets of the solar system (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune) and their satellites. |  sun The Sun is in 2/3 of the galactic center towards the edge, at a distance of 30 000 light years of the center. The Sun moves in a speed of 230 km/s around this galactic center during its revolution which it makes in 250 million years. |  galaxies The Galaxy, it is the name datum in our galaxy, it is an enormous spiral wheel of stars, a diameter of 100 000 light years. What appears of the Earth, it is a white continuous band called the Milky Way. |  bigbang There is 15 billion years a tremendous explosion of light gives birth to the space, in time, in the matter, a chaos burning with an inconceivable heat, a formless porridge which is going to swell, to extend in all the directions and to cool quite slowly. |  quotations Some quotations of big men (Aristotle, Galilee, Newton, Plato, Laplace, Einstein). |  links Some external links concerning the astronomy.

|
|  |  dwarf planets According to the definition which was approved on August 24th, 2006, during the 26th General assembly of the UAI ( International Astronomical Union), three bodies reach the status of dwarfish planet: Pluto, Eris, and Ceres. Others objects should soon join this nomenclature. |  solar system The solar system is really much more complex if we take into account all the objects being a part of the system. A considerable number of objects is in the  Kuiper belt and still beyond in the cloud of Oort. |  heaps Heap of galaxies are the biggest structures of the Universe. They are constituted by hundreds of galaxies connected together by their own gravitational attraction. Between the galaxies we find some material constituted by warm gas there, forming a plasma, the temperature of which reaches 10 to 100 million degrees. |  comets Besides planets, satellites and asteroids, the solar system contains comets (hair in Greek). The roaming comets originate in the depths of the space in several years lights. The number of periodic comets is of the order of 2000. |  biographies Some biographies, Einstein, Baade, Lyot, Hale, Hubble, Shapley, Laplace, Maxwell, Newton, Herschel, Kepler, Galilee, Aristotle... |  glossary Definition of certain words or expressions used on this site in link with the astronomy.

 |
| articles Christian's articles in link with the astronomy (history of the Earth, the electron, the neutrons stars, the rings of Saturn, the particles, the threat of asteroids, journey in the universe up to the atom)... |  exoplanets Exoplanets are situated by definition outside our solar system. Seen the large number of existing galaxies and the large number of stars which they contain, the search for these exoplanets or extra solar planets, is unlimited. |  constellations A constellation is a group of stars of the sky which enough close relations looked the appearance imagination of a figure onto the sky. |  nebulas Of the Latin 'nebula' which wants to say cloud, clouds of gas and dusts in the middle of stars, nebulas are at the same moment active crèches and cemeteries of stars. These magnificence of the sky are lit by the stars which they contain or by stars situated behind them. |  telescopes A telescope is constituted by a mirror which concentrates the light resulting from the observed celestial body and from the objective which supplies an enlarged image with it. The increase and the luminosity are proportional on the surface of the mirror. The presence of the ground atmosphere limits the performances of a telescope. It is to mitigate this inconvenience that spatial telescopes were placed in the space. |  bibliographies Some interesting books in link with the astronomy. |  faq Some simple answers concerning the universe which surrounds us.

 |

| asteroids Numerous small rocky called bodies asteroids are present in the solar system, an important part of them circulate in a ring, between the orbit of Mars and that of Jupiter in 2 to 4 UA.

 |  rings The rings of Saturn are one of more beautiful and of the most surprising spectacles of the solar system. That is why on July 1st, 2004, the spaceship Cassini-Huygens reduced its speed to be captured by the gravity of Saturn to enter in orbit with this one. |  stars A star is a celestial body similar to the Sun, which shines thanks to nuclear reactions which occur in its center. |  multiverse The universe is an expanding cosmic bubble. This bubble creates a new bubble which produces it the others etc.... Quantities of the other universes which give birth to the other universes, it is an interesting idea but which remain at the moment very speculative. |  space probes These instruments that are space probes, perceive in the detail the forms and the composition of objects of the distant regions and offer us exceptional sights of an unequalled precision. |  elements The most usual and practical presentation of the diverse chemical elements is the periodic board of elements also called Table of Mendeleyev. The atoms which have the same number of protons but a number different from neutrons are called isotopes. |  aurora A polar aurora called aurora borealis in the north hemisphere and the aurora australis in the southern hemisphere, is a brilliant phenomenon characterized by sorts of veils extremely colored in the night-sky.

|
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Astronomy - 15 oct. 2007