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Alien Planet Hunt To Get Help From Proxima Centauri Star Alignment

Friday, June 28, 2013 12:51

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The stars will align for planet hunters twice in the next three years, allowing them to probe the nearest star to our own solar system for Earth-size alien worlds.

Proxima Centauri, which lies just 4.24 light-years from Earth, will pass in front of background stars in both October 2014 and February 2016.

Astronomers should scrutinize Proxima during these two periods, looking for subtle light shifts that could reveal the presence of close-orbiting planets, a new study reports.

This wide-field view of the sky around the bright star Alpha Centauri was created from photographic images

forming part of the Digitized Sky Survey 2

“This is an opportunity to determine the mass of Proxima, and also detect planets up to 4 AU [astronomical units] around Proxima Centauri,”

Kailash Sahu, an astronomer with the Space Science Telescope Institute in Baltimore, Md., told reporters today (June 3) at the 222nd meeting of the American Astronomical Society in Indianapolis.

[Alpha Centauri Star System Explained (Infographic)] http://www.space.com/18097-alpha-centauri-stars-planet-explained-infographic.html

One astronomical unit is the distance from Earth to the sun, or about 93 million miles (150 million kilometers).

The closest alien planets?

Proxima Centauri is a red dwarf, meaning it’s cooler and smaller than our own sun.

Image: Hubble space telescope

Red dwarfs are the most common stars in the Milky Way, making up about 75 percent of the galaxy’s stellar population.

They’re good candidates to host rocky, roughly Earth-size worlds, since lower-mass stars tend to have relatively smaller planets, researchers said.

Proxima is part of the three-star Alpha Centauri system, the closest solar system to our own. A scorching-hot rocky exoplanet roughly the size of Earth was discovered circling Alpha Centauri B, another star in the system, last year.

By: Mike Wall

huffingtonpost.com

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