Kepler 22-b was one of 54 exoplanet candidates in habitable zones reported by the Kepler team in February, and is just the first to be formally confirmed using other telescopes.
Will the elite go?
More of these "Earth 2.0" candidates are likely to be confirmed in the near future, though a redefinition of the habitable zone’s boundaries has brought that number down to 48. Ten of those are Earth-sized.
The Kepler space telescope was designed to look at a fixed swathe of the night sky, staring intently at about 150,000 stars. The telescope is sensitive enough to see when a planet passes in front of its host star, dimming the star’s light by a minuscule amount.
Kepler identifies these slight changes in starlight as candidate planets, which are then confirmed by further observations by Kepler and other telescopes in orbit and on Earth.
* Stares fixedly at a patch corresponding to 1/400th of the sky
* Looks at more than 155,000 stars
* Has so far found 2,326 candidate planets
* Among them are 207 Earth-sized planets, 10 of which are in the "habitable zone" where liquid water can exist
Kepler 22-b lies 15% closer to its sun than the Earth is to our Sun, and its year takes about 290 days. However, the planet’s host star puts out about 25% less light, keeping the planet at its balmy temperature that would support the existence of liquid water.
The Kepler team had to wait for three passes of the planet before upping its status from "candidate" to "confirmed".
"Fortune smiled upon us with the detection of this planet," said William Borucki, Kepler principal investigator at Nasa’s Ames Research Center.
"The first transit was captured just three days after we declared the spacecraft operationally ready. We witnessed the defining third transit over the 2010 holiday season."
The results were announced at the Kepler telescope’s first science conference, alongside the staggering number of new candidate planets. The total number of candidates spotted by the telescope is now 2,326 - of which 207 are approximately Earth-sized.
In total, the results suggest that planets ranging from Earth-sized to about four times Earth’s size - so-called "super-Earths" - may be more common than previously thought.
As candidates for planets similar to Earth are confirmed, the Search for Extraterrestrial Intelligence (Seti) has a narrower focus for its ongoing hunt.
"This is a superb opportunity for Seti observations," said Jill Tarter, the director of the Center for Seti Research at the Seti Institute.
"For the first time, we can point our telescopes at stars, and know that those stars actually host planetary systems - including at least one that begins to approximate an Earth analogue in the habitable zone around its host star.
Cyclopean Masonry: A Mystery of the Ancient World 2014 04 16 They don’t make things like they used to, and that is, in some cases, a monumental understatement.
Silly wordplay notwithstanding, there is something to be said for the construction techniques of the old world. Where modern buildings are designed to withstand the elements; wind, temperature extremes, earthquakes and floods, today’s engineers have to strike a balance between economics ...
Megalithic Origins : Ancient connections between Göbekli Tepe and Peru 2014 04 16
At 6,500 years older than Stonehenge and 7,000 years before the pyramids were constructed, a cult megalithic complex sat atop the hills near current day Sanliurfa, in southeast Turkey.
Göbekli Tepe was flourishing an astonishing 12,000 - 14,000 years ago, and today, the preserved remains still exhibits high degrees of sophistication and megalithic engineering skill. Back in the 1990’s when ...
Department of Transportation Uses LRAD Sound Cannons Against Drivers 2014 04 16 The Missouri Department of Transportation revealed two newly acquired LRAD sound cannons this week, which will reportedly be used to target vehicles that speed in work zones.
Coming in at $25,000 a piece, the Long-Range Acoustic Device, a sonic weapon best know for its use against protesters and insurgents in Afghanistan, will alert drivers to road conditions by shooting a loud ...
An ’Unknown Holocaust’ and the Hijacking of History 2014 04 16 An address by Mark Weber, director of the Institute for Historical Review, delivered at an IHR meeting in Orange County, California, on July 25, 2009. (A report on the meeting is posted here.)
We hear a lot about terrible crimes committed by Germans during World War II, but we hear very little about crimes committed against Germans. Germany’s defeat in May ...
Ex-Mayor Bloomberg Starting $50 Million Gun-Control Network 2014 04 16 Former New York Mayor Michael Bloomberg ramped up his efforts to fight gun violence on Wednesday with a plan to spend $50 million on a grassroots network to organize voters on gun control.
The initiative’s political target is the powerful pro-gun lobby, including the National Rifle Association, that spends millions of dollars each year to back gun-rights supporters.
Bloomberg’s group, called Everytown ...