21 December 2017

Aliens?

Space.com has an article by Mike Wall about more news from NASA:

NASA is about to announce some more big alien-planet news. The agency will hold a news conference on Thursday, 14 December 2017 at 1800 GMT to reveal a new discovery made by its prolific Kepler space telescope (illustration above), which has been searching the heavens for alien worlds since 2009. Space.com will air the briefing live, courtesy of NASA.
"The discovery was made by researchers using machine learning from Google," NASA officials wrote in a media advisory. "Machine learning is an approach to artificial intelligence, and demonstrates new ways of analyzing Kepler data."
The following people will participate in the news conference:
Paul Hertz, director of NASA's Astrophysics division at the agency's headquarters in Washington, DC.
Christopher Shallue, senior software engineer at Google AI in Mountain View, California.
Andrew Vanderburg, astronomer and NASA Sagan postdoctoral fellow at The University of Texas at Austin.
Jessie Dotson, Kepler project scientist at NASA's Ames Research Center at Moffett Field, California. 
Kepler spots alien worlds by noticing the tiny brightness dips they cause when they cross the face of their host star from the spacecraft's perspective. Kepler is the most accomplished planet hunter in history. It has found more than twenty-five hundred confirmed alien worlds, about seventy percent of all known exoplanets , along with a roughly equal number of "candidates" that await confirmation by follow-up observations or analyses.
The vast majority of these discoveries have come via observations that Kepler made during its original mission, which ran from 2009 to 2013. Study of these data sets is ongoing; over the past few years, researchers have used improved analysis techniques to spot many exoplanets in data that Kepler gathered a half-decade ago or more.
Astronomers have confirmed more than eight hundred planets beyond our own solar system.
Kepler's first mission, which involved staring continuously at about a hundred and fifty thousand stars, ended in May of 2013, when the spacecraft lost its second orientation-maintaining "reaction wheel." But the telescope's handlers soon figured out a way to stabilize Kepler using sunlight pressure. It is now on a second mission, called K2, during which it's hunting for exoplanets on a more limited basis and making a number of other observations.
Rico says we could use some non-illegal aliens these days...

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