New exoplanet: Surface temperature 4,300degC

KELT-9b : l’exoplanète géante tellement chaude qu’elle pourrait exploser.

Huge exoplanet hot enough to explode.

Cette planète a été découverte en dehors de notre système solaire, à 650 années-lumière de notre Terre.

This planet, discovered outside our solar system is at 650 light-years from Earth.

 Vue d\'artiste d\'une planete extrasolaire, devant son etoile.
Vue d’artiste d’une planete extrasolaire, devant son etoile. (D.DUCROS / NOVAPIX / AFP). Artist impression of the exoplanet, in front of it’s sun.

 

franceinfoFrance Télévisions

Mis à jour le
publié le

Elle a été baptisée KELT-9b. Et elle n’en finit pas d’étonner les astronomes qui l’ont découverte. Cette exoplanète est très chaude à sa surface, elle est aussi gigantesque et elle possède un queue semblable à celle des comètes, selon la description faite dans le magazine Nature, lundi 5 juin.

The planet has been christened KELT-9b. And it is still surprising the astronomers who discovered it. This exoplanet is extremely hot at it’s surface, it is also gigantic and has a trail resembling that of comets, according to the description published in the Nature magazine on Monday 5th June.

KELT-9b est près de trois fois plus massive que Jupiter, qui est à titre de comparaison la plus grosse planète de notre système solaire. Elle tourne autour d’une étoile bleue à 650 années-lumière de notre Terre. Une étoile deux fois plus chaude que notre Soleil autour de laquelle elle tourne en un jour et demi.

KELT-9b is close to three times bigger than Jupiter, which holds the title of the biggest planet in our solar system. It orbits a blue star at 650 light-years from Earth. The star is twice as hot as our Sun around which KELT-9b  orbits in one and a half days.

Plus de 4 300 degrés Celsius à sa surface. A surface temperature of more than 4,300 degrees Celsius.

L’une des faces de KELT-9b reste plongée dans une nuit perpétuelle. L’autre est exposée aux radiations de son étoile et à une chaleur extrême de plus de 4 300 degrés Celsius (7 820 degrés Fahrenheit). “C’est si chaud que nous pensons qu’aucune molécule ne peut vivre sur la face exposée à la lumière de cette planète”, explique le chercheur Scott Gaudi de l’Ohio State University, cité par NPR (en anglais).

One face of KELT-9b stays plunged in perpetual night. The other is exposed to constant radiation from it’s star and in an extreme heat-wave of more than 4,300  degC. “It is so hot that we think that no molecular life can live at the side of the planet exposed to light, ” explained the researcher Scott Gaudi de l’Ohio State University.   

A cause de cette chaleur, son atmosphère faite de gaz s’évapore probablement à grande vitesse. Peut-être même à une telle vitesse que KELT-9b pourrait exploser avant même que l’étoile autour de laquelle elle gravite ne meure, estiment les scientifiques.

Because of this extreme heat, it’s atmospheric gas probably evaporates at a massive rate. Perhaps also because of it’s orbital speed KELT-9b could explode before the gravitational pull of it’s star dies out, estimated the scientists.

About bill

Worked in the technical / engineering area as a Science Laboratory Technician and as an Aeronautics Engineer. The artistic side involves writing under the nom de plume of Billy Olsenn, his recently written play 'A Case of Wine' was staged by the players group Straight Make-Up at the 2012 Birr one act drama festival. It's next staging was in the one act circuit is in Cavan, at Maudebawn on Sat 10 Nov 2012. Then it was performed in the Bray, Co.Wicklow at the very popular one act festival in January 2013. Next play is FEAR. A dark tale about revenge on the cruel death of two pensioners by young thugs. Neighbours hatch a devious and dangerous plan to exact old-style revenge. Bill is a member of the Drama League of Ireland and his plays have been critically vetted and certified as original pieces of work by the DLI. Another literary project is that of commemoration of an aircraft crash on Djouce mountain in Wicklow in 1946. Bill wrote articles for the 50th, 60th and most recently the 70th anniversary, (12 Aug 2016) all were published in the Wicklow Times and ensured the survivors of the crash, all French Girl Guides, were not forgotten. Articles reproduced on this website. But mostly this site gives a more general European and specific French slant on popular and not so popular articles of French news, translated to English by the author. Each article is translated on a paragraph by paragraph basis so easy to read in either language and even possible to improve either language by comparison of the short English and French paragraphs. Amusez vous bien. The author is currently writing an easy to read technical aviation book centered around the Fokker 50. Another interest is that dealt with in another of Bill's websites www.realnamara.net, a Statue of the mother of God, Mary. It was erected in 1972 in Dublin, at the end of the Bull Wall near Clontarf, and my grandfather William Nelson, was the main instigator of that project. I give talks on the history of the statue and my grandfather's adventurous and dangerous life at sea. Technical assistance with each website is by J O'N.
This entry was posted in Uncategorized. Bookmark the permalink.