These three new exoplanets have a mass between one and 10 times that of Earth, making them super-Land. They have just been discovered by astronomers from the University of Geneva and orbit around a star named HD219134 baptized. The latter, which is colder and slightly smaller than the Sun, located 21 light years from us in the constellation Cassiopeia.
The researchers, who published a statement on the subject indicate that one of the super-Earths in particular was analyzed, when it passed its star. It is the American Spitzer space telescope that detected them. Named HD219134b, it has a diameter 1.6 times that our planet and 4.5 times more massive. Its density is probably very close to the Earth, and hence its composition should be very similar.
427 ° C on the surface of the super-Earth
Scientists at the University of Geneva does not hesitate to assert “the closest land composition of the planet ours “. Nevertheless, its surface temperature is very different from the Earth: it is about 700 Kelvin, or 427 degrees Celsius. Regarding the other two super-Earths, one of which weighs 2.7 times the weight of our Earth and orbit around the star in 6.8 days. The other is 8.7 times the weight of the Earth and its orbital period is 46.8 days.
The discovery of these three new super-Earth interest at the highest point of the astronomical community which would include more information on the weather conditions on these planets. It is already planned to complement the research with new observations from Earth but also to use the advanced capabilities of the new James Webb Space Telescope (created through a partnership between NASA and ESA). And maybe one day, in a decade, a first detailed photograph of what Exoplanetary system can be performed using the new generation of giant telescopes that should come between 2020 and 2030.
MORE INFO
& gt; & gt; PHOTOS – Discover the most beautiful images of the sky and space
& gt; & gt; VIDEO – How an aspirin dissolves in a water bubble in space
& gt; & gt; Mars: Curiosity discovers a fragment of rock containing oxygen
No comments:
Post a Comment