Showing posts with label exoplanets. Show all posts
Showing posts with label exoplanets. Show all posts
Nov 10, 2012
Une 7e planète habitable est découverte 42 années-lumière de nous
Et de 7 ! Et celle-là tourne autour de son axe et connait donc la nuit et le jour...
Dec 1, 2010
Le nombre d'étoiles et de planètes dans l'univers vient d'être multiplié par 3 ! On avait encore un peu de merde dans les yeux...
Le nombre d'étoiles vient d'être multiplié par 3 parce qu'on vient juste de s'apercevoir qu'avant, on ne voyait pas les naines rouges des autres galaxies, en particulier les galaxies elliptiques, qui sont les plus anciennes et qui contiennent donc le plus de naines rouges.
On avait apparemment de la merde dans les yeux...comme à chaque étape de la découverte d'autres mondes, et cela depuis Ptolémée et même avant lui !
Du coup, la masse des objets observables est elle aussi multipliée par 3 et la masse de la matière "noire" (=encore inobservée) se réduit d'un coup d'autant !!!
Assez de théories à la noix pour chercher la masse manquante : Elle ne manque juste qu'à nos yeux qui sont décidémment très embués...
Finalement, l'histoire de la découverte du monde et de l'univers, se résume à l'histoire de la sortie de la pénombre de la caverne de Platon. Plus on sort, mieux on voit ! Au pays des aveugles, les borgnes sont rois !
Un message d'encouragement à nos jeunes pour sortir de leurs trous, en quelque sorte ! Les mondes sont là, ils n'attendent que vous !
On avait apparemment de la merde dans les yeux...comme à chaque étape de la découverte d'autres mondes, et cela depuis Ptolémée et même avant lui !
Du coup, la masse des objets observables est elle aussi multipliée par 3 et la masse de la matière "noire" (=encore inobservée) se réduit d'un coup d'autant !!!
Assez de théories à la noix pour chercher la masse manquante : Elle ne manque juste qu'à nos yeux qui sont décidémment très embués...
Finalement, l'histoire de la découverte du monde et de l'univers, se résume à l'histoire de la sortie de la pénombre de la caverne de Platon. Plus on sort, mieux on voit ! Au pays des aveugles, les borgnes sont rois !
Un message d'encouragement à nos jeunes pour sortir de leurs trous, en quelque sorte ! Les mondes sont là, ils n'attendent que vous !
Sep 22, 2010
Ca y est, on a trouvé un nouveau système solaire complet
On progresse...
Rappels historiques:
1530 Nicolas Copernic découvre que le Soleil ne tourne pas autour de la Terre mais que c'est l'inverse
1610 Galilée découvre que d'autres planètes ont des lunes et que tout ne tourne pas autour du Soleil et que la voie lactée est un nuage dense d'étoiles.
1825 Friedrich Bessel montre que les étoiles sont des objets semblables au Soleil.
1917 Herber Curtis découvre qu'il y a d'autres galaxies que la Voie Lactée.
On découvre plus tard qu'elles sont plusieurs centaines de milliards dans l'univers observable.
1990 Aleksander Wolszczan détecte la 1ère planète extra-solaire autour du Pulsar PSR B1257+12. Sa découverte n'est publiée qu'en 1992.
1995 Michel Mayor et Didier Queloz découvrent des planètes autour de l'étoile 51 Pegasi (la même équipe de l'observatoire de Genève en a depuis découvert plus de 200)
2001 la 1ère atmosphère est détectée sur l'exoplanète Osiris
2004 la 1ère planète possiblement tellurique de moins de 15 fois la masse de la Terre est détectée: Mu Arae d
2005 Les européens prennent les 1ères images directes d'une exoplanète autour de la naine brune GPCC-2M1207.
2006 Jean-Philippe Beaulieu découvre la planète OGLE-2005-BLG-390Lb qui ne fait que 5 fois la masse de la Terre avec une température de -220°C.
2006 Michel Mayor découvre le 1er système neptunien de 3 planètes.
2007 Le CNRS découvre la 1ère planète dans une zone habitable: Gliese 581 c à seulement 20,5 années-lumière de la Terre.
2009 le satellite CoRot détecte CoRoT-7b, la plus petite des exoplanètes jamais observées à ce jour qui fait près de deux fois le diamètre de la Terre et rentrant dans la catégorie des Super-Terres.
2009 Découverte de Gliese 1214 b composée d'une grande quantité d'eau.
2010 Une équipe d’astronomes européenne découvre un système de 5 à 7 planètes autour de l'étoile HD 10180, similaire au Soleil.
Etant donné la progression exponentielle des découvertes, trouver une jumelle exacte de la Terre n'est désormais plus qu'une question de mois...
Rappels historiques:
1530 Nicolas Copernic découvre que le Soleil ne tourne pas autour de la Terre mais que c'est l'inverse
1610 Galilée découvre que d'autres planètes ont des lunes et que tout ne tourne pas autour du Soleil et que la voie lactée est un nuage dense d'étoiles.
1825 Friedrich Bessel montre que les étoiles sont des objets semblables au Soleil.
1917 Herber Curtis découvre qu'il y a d'autres galaxies que la Voie Lactée.
On découvre plus tard qu'elles sont plusieurs centaines de milliards dans l'univers observable.
1990 Aleksander Wolszczan détecte la 1ère planète extra-solaire autour du Pulsar PSR B1257+12. Sa découverte n'est publiée qu'en 1992.
1995 Michel Mayor et Didier Queloz découvrent des planètes autour de l'étoile 51 Pegasi (la même équipe de l'observatoire de Genève en a depuis découvert plus de 200)
2001 la 1ère atmosphère est détectée sur l'exoplanète Osiris
2004 la 1ère planète possiblement tellurique de moins de 15 fois la masse de la Terre est détectée: Mu Arae d
2005 Les européens prennent les 1ères images directes d'une exoplanète autour de la naine brune GPCC-2M1207.
2006 Jean-Philippe Beaulieu découvre la planète OGLE-2005-BLG-390Lb qui ne fait que 5 fois la masse de la Terre avec une température de -220°C.
2006 Michel Mayor découvre le 1er système neptunien de 3 planètes.
2007 Le CNRS découvre la 1ère planète dans une zone habitable: Gliese 581 c à seulement 20,5 années-lumière de la Terre.
2009 le satellite CoRot détecte CoRoT-7b, la plus petite des exoplanètes jamais observées à ce jour qui fait près de deux fois le diamètre de la Terre et rentrant dans la catégorie des Super-Terres.
2009 Découverte de Gliese 1214 b composée d'une grande quantité d'eau.
2010 Une équipe d’astronomes européenne découvre un système de 5 à 7 planètes autour de l'étoile HD 10180, similaire au Soleil.
Etant donné la progression exponentielle des découvertes, trouver une jumelle exacte de la Terre n'est désormais plus qu'une question de mois...
Jan 25, 2010
BBC News - Astronomers hopeful of detecting extra-terrestrial life
The BBC, the English and their old Lord suddenly wake up to the pace of scientific progress in the search for extraterrestrial life: Never too late !
Apr 26, 2009
Exploration : une planète habitable ? - Science.gouv.fr
Gliese 581d est dans la zone d'habitabilité et contient probablement de l'eau liquide !
Jan 6, 2009
Habitable Exoplanets Could Be Common in Our Galaxy | Wired Science from Wired.com
So now, habitable planets could be common...Let see what new objections creationists will now come up with....I can't wait to read their nonsense !
Dec 11, 2008
Exoplanet may harbour stormy skies : Nature News
OK, so let's summarize this :
We were first told Earth was flat and in any case unique, and that the Sun was unique and revolving around our flat Earth, then we were told that it was the opposite, then we were told that OK, there were millions of other stars but without planets, then we were told that OK, there are millions of planets but only giant ones, then we were told that OK, there are other near earth-size planets but with no trace of methane/carbon dioxide/water and then methane, then carbon dioxide then water are now said to be abundant on exoplanets.
What will they now tell us to deny the probability of zillions of forms of extra-terrestrial life ?
The truth is this : We just come progressively out of darkness. We were just blind, especially since we chose to be guided by blind and dumb quacks. Now that our telescopes become more accurate, we may as well kick their asses...
We were first told Earth was flat and in any case unique, and that the Sun was unique and revolving around our flat Earth, then we were told that it was the opposite, then we were told that OK, there were millions of other stars but without planets, then we were told that OK, there are millions of planets but only giant ones, then we were told that OK, there are other near earth-size planets but with no trace of methane/carbon dioxide/water and then methane, then carbon dioxide then water are now said to be abundant on exoplanets.
What will they now tell us to deny the probability of zillions of forms of extra-terrestrial life ?
The truth is this : We just come progressively out of darkness. We were just blind, especially since we chose to be guided by blind and dumb quacks. Now that our telescopes become more accurate, we may as well kick their asses...
Nov 13, 2008
Exoplanets finally come into view
Direct Spotting at last ! Hurray ! A 3 planets system ! Wow !
Who said the solar system was unique ? The sun was unique ? The old world was unique ? Earth was flat ? ...and who now says there can't be life elsewhere again ??? The same narrow-minded fucktards forever, huh ?
Thousands of new planets will now be spotted yearly, thanks to specialised space telescopes like European Space Agency's wonderful COROT.
My bet is that these fucktards will soon run out of babble to justify their holy books...
Who said the solar system was unique ? The sun was unique ? The old world was unique ? Earth was flat ? ...and who now says there can't be life elsewhere again ??? The same narrow-minded fucktards forever, huh ?
Thousands of new planets will now be spotted yearly, thanks to specialised space telescopes like European Space Agency's wonderful COROT.
My bet is that these fucktards will soon run out of babble to justify their holy books...
Oct 28, 2008
The McGill Daily - Milky Way may be full of meat - Scitech
Such a simple way to detect photosynthesis on distant exoplanets ! And photosynthesis means...err...LIFE !!!
Oct 17, 2008
How Long Until We Find a Second Earth ?
At last a comprehensive story describing the international state of the art.
Un hommage mérité à Annie Baglin, la Maman de COROT !
Un hommage mérité à Annie Baglin, la Maman de COROT !
Sep 30, 2008
A Gas Giant At Epsilon Eridani May Harbor Life On Its Moons
Epsilon Eridani is a star only 10 light years away. It is known to have at least one and possibly several planets, one of which is thought to be similar to Jupiter. And now an astronomer suggests that its moons may be in an excellent position to have extraterrestrial life on them!
(Artist’s conception of the Epsilon Eridani system courtesy of CosmicRAY.)
Ray Villard, a blogger at Discovery Channel’s CosmicRAY blog and head of the Hubble Space Telescope’s Public Information Office, has pointed out an exciting fact. One of the explanets around Epsilon Eridani has an orbit which is quite conducive to the formation and survival of life as we know it. The reason has to do with the orbit of the planet and the nature of the star itself. Here’s the skinny (orbital schematic courtesy of Extrasolar Visions):
Epsilon Eridani is a K2 class star; our sun Sol is a G2 class star. These two classes are very similar; thus a planet orbiting within 1 astronomical unit (AU) of Epsilon Eridani could expect to have conditions similar to those of Earth. It turns out Epsilon Eridani B, the only confirmed explanet in the system, does just that. But unfortunately, there is a catch. Epsilon Eridani B has an eccentric orbit, periodicity of 0.7, the most eccentric orbit of any known exoplanet in fact. What does this mean? It means that the planet swings from a distance of about 1 AU to a distance of over 5 AU every 8 years or so. (5 AU is the distance of Jupiter from our sun.) So while a moon of the world might be nice and comfy for part of its year, it would get very cold and dark for a longer part. This is not a good thing for earth-type life!
But…
If the moon had an atmosphere like Venus‘, then much heat would be trapped and not lost during the colder part of the orbit. And computer models show that it is entirely possible for the mass surrounding a Jovian-class exoplanet to coalesce into a single, Mars-sized world that could hold a significant atmosphere. Also, life can exist at much more extreme conditions than previously thought. So the bottom line is that this planet, if it does indeed have a moon of the right type, could definitely be a target for exobiologists once the technology is available to study it.
(Artist’s conception of the Epsilon Eridani system courtesy of CosmicRAY.)
Ray Villard, a blogger at Discovery Channel’s CosmicRAY blog and head of the Hubble Space Telescope’s Public Information Office, has pointed out an exciting fact. One of the explanets around Epsilon Eridani has an orbit which is quite conducive to the formation and survival of life as we know it. The reason has to do with the orbit of the planet and the nature of the star itself. Here’s the skinny (orbital schematic courtesy of Extrasolar Visions):
Epsilon Eridani is a K2 class star; our sun Sol is a G2 class star. These two classes are very similar; thus a planet orbiting within 1 astronomical unit (AU) of Epsilon Eridani could expect to have conditions similar to those of Earth. It turns out Epsilon Eridani B, the only confirmed explanet in the system, does just that. But unfortunately, there is a catch. Epsilon Eridani B has an eccentric orbit, periodicity of 0.7, the most eccentric orbit of any known exoplanet in fact. What does this mean? It means that the planet swings from a distance of about 1 AU to a distance of over 5 AU every 8 years or so. (5 AU is the distance of Jupiter from our sun.) So while a moon of the world might be nice and comfy for part of its year, it would get very cold and dark for a longer part. This is not a good thing for earth-type life!
But…
If the moon had an atmosphere like Venus‘, then much heat would be trapped and not lost during the colder part of the orbit. And computer models show that it is entirely possible for the mass surrounding a Jovian-class exoplanet to coalesce into a single, Mars-sized world that could hold a significant atmosphere. Also, life can exist at much more extreme conditions than previously thought. So the bottom line is that this planet, if it does indeed have a moon of the right type, could definitely be a target for exobiologists once the technology is available to study it.
Aug 22, 2008
Aug 21, 2008
Planets without metal cores may be bad for life - or not....
That's what I love about Science : each new discovery raises new questions and challenges to theories...
Aug 8, 2008
New computer simulations show how special the solar system is
Bad news for SETI, but I am suspicious of "unicity" claims, usually backed by religious zealots who want reality to stick to their book at any price: They told us the Old World was unique, that Earth was at the center of the universe, that the Solar system was the sole planetary system, that Earth was the unique rocky planet...and every fact was disproved. So what now ? Contrary to the scientific method, they design the methods to back their theory, instead of observing nature without prejudice. They WANT us to be unique !
Predictably, this study is backed by no statistical or probability analysis.
Reality is stubborn, however, and whatever they say, the universe comprises hundreds of billions of galaxies that contain hundreds of billions of stars. Searching a needle in that haystack, serious astronomers already evidenced 300 planets using SCIENTIFIC methods of observation, including more and more earth-like (a 1/3 of them, as it is now estimated), although they've been searching very recently and with very poor subsidies so far because the money is diverted to silly and totally useless manned missions to inhabitable solar planets that can be studied as well from afar. This diversion is entirely driven by chauvinism. Astronomy is a SCIENCE, not an extreme-sport !
I'm confident that given the mind-blowing magnitude of the universe and the length of its history, whatever the probabilities, millions of planets will be evidenced if only we dedicate the necessary energy, and I'll slap the next wackoos who will tell us we're unique again with a fish...
Predictably, this study is backed by no statistical or probability analysis.
Reality is stubborn, however, and whatever they say, the universe comprises hundreds of billions of galaxies that contain hundreds of billions of stars. Searching a needle in that haystack, serious astronomers already evidenced 300 planets using SCIENTIFIC methods of observation, including more and more earth-like (a 1/3 of them, as it is now estimated), although they've been searching very recently and with very poor subsidies so far because the money is diverted to silly and totally useless manned missions to inhabitable solar planets that can be studied as well from afar. This diversion is entirely driven by chauvinism. Astronomy is a SCIENCE, not an extreme-sport !
I'm confident that given the mind-blowing magnitude of the universe and the length of its history, whatever the probabilities, millions of planets will be evidenced if only we dedicate the necessary energy, and I'll slap the next wackoos who will tell us we're unique again with a fish...
Jul 28, 2008
New Technologies Accelerate Search for Earth-Like Planets to Tipping Point
at last, THEY start noticing !
Who will dare conclude that religions are doomed ? I do !
Not only are they late on the event, the media have now no vision anymore...
What can you expect from idiots who missed the cultural revolution in China ?
Who will dare conclude that religions are doomed ? I do !
Not only are they late on the event, the media have now no vision anymore...
What can you expect from idiots who missed the cultural revolution in China ?
Jul 25, 2008
FOXNews.com - French Scientists Find New Alien World
Fox News crediting the French equates to a miracle !
Jul 19, 2008
Exoplanet count tops 300 with discovery of 'super-Earths'
At last, somebody notices the scientific breakthrough instead of focusing on Sarkozy's slightest fart !
Jul 17, 2008
Jul 12, 2008
The first habitable exo-Earth might be detected from Earth itself
How ironic would it be if an amateur astronomer was the one to find it first ?
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