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<p>[QUOTE="Ocatarinetabellatchitchix, post: 6588188, member: 99554"]A study published Today in the prestigious journal <i>Science</i> reveals the discovery of an exoplanet that could have an atmosphere and, ultimately, present traces of life. The ultimate goal is to find biological markers, biosignatures, in the atmospheres of exoplanets, that is, signs of life on habitable planets similar to Earth. About 4,000 exoplanets have been discovered over the past 25 years, and a few have been shown to have an atmosphere. However, these are large gaseous or icy planets...</p><p>The name of this exoplanet? <b>Gliese 486 b</b>. It is about 30% larger than the Earth, but is 2.8 times heavier and is found in what is called the habitable zone around a star.</p><p><br /></p><p>[ATTACH=full]1264920[/ATTACH] </p><p><br /></p><p>It is "only" 26 light years away, which places it third among the closest known exoplanets in transit, that is, on a path where they are seen passing in front of their star. But the proximity of this exoplanet to its star also makes it very hot [at least 800° F]. <b>Gliese 486 b </b>is dotted with volcanoes and rivers of lava; thus, it is not habitable.</p><p>However, if this planet has an atmosphere, all planets further away [from the star] with similar characteristics will have an atmosphere, and more likely to be habitable. Every amateur astronomer eagerly awaits the deployment of the highly anticipated James Webb Space Telescope, due for launch this year. Thanks to him, it would be possible, in at best about three years, to say whether or not this exoplanet has an atmosphere, and to give its composition.</p><p><br /></p><p>So to celebrate this discovery, I'd like to see your coins related to planets. The choice is quite wide : <b>Mercury, Venus, Mars, Jupiter, Saturn or Neptune !</b></p><p><b><br /></b></p><p>A few not shown lately:</p><p><br /></p><p><b>Agrippa Neptune</b></p><p><b>[ATTACH=full]1264921[/ATTACH] </b></p><p><b><br /></b></p><p><b>Tetricus Mars</b></p><p><b>[ATTACH=full]1264922[/ATTACH] </b></p><p><b><br /></b></p><p><b>Numerian Mars</b></p><p><b>[ATTACH=full]1264923[/ATTACH] </b></p><p><b><br /></b></p><p><b>Licinius II Jupiter[ATTACH=full]1264924[/ATTACH]</b></p><p><b><br /></b></p><p><b>Macrinus Venus</b></p><p>[ATTACH=full]1264925[/ATTACH] </p><p>[/QUOTE]</p><p><br /></p>
[QUOTE="Ocatarinetabellatchitchix, post: 6588188, member: 99554"]A study published Today in the prestigious journal [I]Science[/I] reveals the discovery of an exoplanet that could have an atmosphere and, ultimately, present traces of life. The ultimate goal is to find biological markers, biosignatures, in the atmospheres of exoplanets, that is, signs of life on habitable planets similar to Earth. About 4,000 exoplanets have been discovered over the past 25 years, and a few have been shown to have an atmosphere. However, these are large gaseous or icy planets... The name of this exoplanet? [B]Gliese 486 b[/B]. It is about 30% larger than the Earth, but is 2.8 times heavier and is found in what is called the habitable zone around a star. [ATTACH=full]1264920[/ATTACH] It is "only" 26 light years away, which places it third among the closest known exoplanets in transit, that is, on a path where they are seen passing in front of their star. But the proximity of this exoplanet to its star also makes it very hot [at least 800° F]. [B]Gliese 486 b [/B]is dotted with volcanoes and rivers of lava; thus, it is not habitable. However, if this planet has an atmosphere, all planets further away [from the star] with similar characteristics will have an atmosphere, and more likely to be habitable. Every amateur astronomer eagerly awaits the deployment of the highly anticipated James Webb Space Telescope, due for launch this year. Thanks to him, it would be possible, in at best about three years, to say whether or not this exoplanet has an atmosphere, and to give its composition. So to celebrate this discovery, I'd like to see your coins related to planets. The choice is quite wide : [B]Mercury, Venus, Mars, Jupiter, Saturn or Neptune ! [/B] A few not shown lately: [B]Agrippa Neptune [ATTACH=full]1264921[/ATTACH] Tetricus Mars [ATTACH=full]1264922[/ATTACH] Numerian Mars [ATTACH=full]1264923[/ATTACH] Licinius II Jupiter[ATTACH=full]1264924[/ATTACH] Macrinus Venus[/B] [ATTACH=full]1264925[/ATTACH] [B] [/B][/QUOTE]
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