First ‘habitable’ exoplanet confirmed
PARIS: A rocky world orbiting a nearby star was confirmed as the first planet outside our Solar System to meet key requirements for sustaining life.
Modelling of planet Gliese 581d shows it has the potential to be warm and wet enough to nurture Earth-like life, scientists have said. It orbits a red dwarf star called Gliese 581, located around 20 light years from Earth, which makes it one of our closest neighbours.
Gliese 581d orbits on the outer fringes of the star’s ‘Goldilocks zone’, where it is not so hot that water boils away, nor so cold that water is perpetually frozen. Instead, the temperature is just right for water to exist in liquid form.
“With a dense carbon dioxide atmosphere – a likely scenario on such a large planet – the climate of Gliese 581d is not only stable against collapse but warm enough to have oceans, clouds and rainfall,” France’s National Centre for Scientific Research (CNRS) said.
More than 500 planets orbiting other stars have been recorded since 1995, detected mostly by a tiny wobble in stellar light. Exoplanets are named after their star and listed alphabetically, in order of discovery.
Until now, the big interest in Gliese 581’s roster of planets focussed on Gliese 581g. It leapt into the headlines last year as ‘Zarmina’s World’, after its observers announced it had roughly the same mass as Earth’s and was also close to the Goldilocks zone.
Next month, despite opposition from conservative curators, Japanese Pop art star Takashi Murakami will open a solo exhibition at Versailles outside Paris. Murakami will be the third contemporary artist given access to the former seat of French monarchy, following Jeff Koons in 2008 and Xavier Veilhan in 2009. The exhibition (September 13-December 12), will feature 22 pieces, half of which were created especially for the occasion, including sculptures, lamps (pictured), and one painting, one video and one carpet.
Tour Signal was a proposed skyscraper in La Défense and in Puteaux, France. Medea and Layetana were the developers with Ateliers Jean Nouvel as architects.
West Gate was chosen as the location for the building in order to open the La Défense district to the municipality of Puteaux. The project’s ambition was to create a stronger polarity at the heart of the Île-de-France and develop a major attraction while relating the project to its natural and built environment and, lastly, embodying the various elements which strengthen the feeling that the project belongs in the district.
This project has been cancelled. In 2009, Medea and Layetana announced they are not involved in the project anymore, and the new president of the EPAD Joëlle Ceccaldi-Raynaud declared her opposition to the tower which looks like an unaesthetic “monolith”.