Posts Tagged ‘habitable’

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An extraordinary time to be conducting SETI observations

December 8, 2011

by tte-77

SETI

The Allen Telescope Array (ATA) - Credit: SETI

Telescopes at SETI (Search for Extraterrestrial Life) are once again operational and searching planetary systems for signals of possible extraterrestrial intelligence. Great news I know, better still some of its first targets are the exoplanet candidates recently discovered by NASA’s Kepler space telescope.

SETI’s Alan Telescope Array (ATA) had been in hibernation since April following the withdrawal of the SETI Institute’s former partner, U.C. Berkeley – the operator of the observatory in California where the ATA is located – due to budgetary shortfalls (yawn yawn).

New funding has recently been acquired for observatory operations allowing the ATA to resume observations and work to examine the thousands of new candidate planets found by Kepler, with the highest priority given to the worlds discovered that are located in their star’s habitable zone.

Resuming observations was possible thanks to the interest and generosity of the public who supported the institute’s research via the SETI website with additional funds being provided by the United States Air Force as part of their formal assessment of the instrument’s utility for Space Situational Awareness.

From Jill Tarter, Director of SETI Research: We are exploring once again, with renewed enthusiasm.  While our work with the US Air Force to try to avoid future collisions in space will insure that the array is maintained in good operating condition, we will continue to have to raise the funds to conduct our SETI observations.

Awesome news! visit SETI here to find out more, donate too should you support the cause.

Source: SETI

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NASA’s Kepler confirms first planet orbiting two stars

September 15, 2011

by tte-77

Kepler-16b just like Tatooine

Just like "Star Wars" Tatooine newly discovered Kepler-16b is a world where two suns set over the horizon - Credit: NASA TV

Exciting news from the Kepler mission announced at 1800 UTC/GMT + 1 today.

The existence of a world with two suns like Tatooine, as seen in the film Star Wars more than 30 years ago, is now scientific fact.

NASA’s Kepler mission has made the first real detection of a circumbinary planet (a planet orbiting two stars) located 200 light-years from Earth.

The planet, called Kepler-16b, is not thought to be habitable. It is thought to be a cold world, with a gaseous surface. So what’s all the fuss about?

“This discovery confirms a new class of planetary systems that could harbor life,” Kepler principal investigator William Borucki said. “Given that most stars in our galaxy are part of a binary system, this means the opportunities for life are much broader than if planets form only around single stars. This milestone discovery confirms a theory that scientists have had for decades but could not prove until now.”

Scene from Star Wars showing the two suns from Tatooine

Scene from Star Wars showing the two suns from Tatooine - Credit: Lucasfilm Ltd. / NASA TV

Although Kepler-16b lies outside the system’s habitable zone, where liquid water could exist on the surface at least we now know how to detect circumbinary planets and maybe we’ll find more, one like Tatooine that can actually harbor life?

Read the full media release from NASA here.

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HARPS discovers 50 new exoplanets

September 12, 2011

by tte-77

sky watching HD 85512

Artist's impression showing the planet orbiting the Sun-like star HD 85512 in the southern constellation of Vela (The Sail) - Credit: ESO/M. Kornmesser

And there’s us thinking NASA’s Kepler telescope rules the roost over exoplanet hunting!

Today astronomers in La Silla, Chile announced a fertile haul of more than 50 new exoplanets – the latest results using ESO’s exoplanet hunter HARPS (High Accuracy Radial velocity Planet Searcher). The haul includes 16 super-Earths, one of which orbits at the edge of it’s habitable zone around its star. By studying the properties of the planets found so far, the ESO team have discovered that around 40% of stars similar to our Sun have at least one planet lighter than Saturn.

Lead author Dr Michel Mayor, from the University of Geneva in Switzerland, said the haul included “an exceptionally rich population of super-Earths and Neptune-type planets hosted by stars very similar to our Sun”.

He added: “The new results show that the pace of discovery is accelerating.”

One of the recently announced newly discovered planets, HD 85512 b, is estimated to be only 3.6 times the mass of the Earth and is located at the edge of the habitable zone.

“This is the lowest-mass confirmed planet discovered by the radial velocity method that potentially lies in the habitable zone of its star, and the second low-mass planet discovered by HARPS inside the habitable zone,” says Lisa Kaltenegger (Max Planck Institute for Astronomy, Heidelberg, Germany and Harvard Smithsonian Center for Astrophysics, Boston, USA), who is an expert on exoplanets habitability.

Astronomers are confident they are close to discovering other small and rocky habitable planets around stars similar to our Sun. Moving forward new instruments are planned to further the search and include a copy of HARPS to be installed on the Telescopio Nazionale Galileo in the Canary Islands, to survey stars in the northern sky, as well as a new and more powerful planet-finder, ESPRESSO, to be installed on ESO’s Very Large Telescope in 2016. Looking further into the future the planned CODEX instrument on the European Extremely Large Telescope (E-ELT) will push this technique to a higher level.

Wouldn’t it be great to wake up one morning to a fresh Sky-Watching post actually detailing a habitable planet! I guess by then we could just beam the information directly to your brain! ;)

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