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Earth

Submission + - Genetically Engineered Bacteria Could Help Fight Climate Change (sciencemag.org)

sciencehabit writes: As humans warm the planet by releasing carbon dioxide into the atmosphere, some researchers believe that capturing CO2 and trapping it in buried rocks could lower the risk of catastrophic climate change. Now a team of researchers has shown that bacteria can help the process along. They can even be genetically modified to trap CO2 faster, keeping it underground for millions of years.
Space

Submission + - Astronomers Search for Earth-Like Planet Next Door (blogspot.com) 1

Adam Korbitz writes: "Back in March I posted about a team of researchers at the University of California-Santa Cruz who have proposed a computer model that predicts Alpha Centauri -- the star closest to our own Sun — may harbor at least one Earth-like terrestrial planet orbiting within the habitable zone of one of the system's component stars. Astronomers hope they may be able to detect such planets, if they exist, in the relatively near future using the well-established radial velocity method that measures the wobble caused by planets as they orbit their host stars.

The hunt for that Earth-like planet around Alpha Centauri B is now underway in Chile.

According to the NASA/JPL website Planet Quest:

At a little over four light years from Earth, the sunlike star Alpha Centauri B — actually a member of a three-star system — is our sun's closest neighbor and practically a stone's throw away in celestial terms.

[The] planet-hunting team is using a telescope in Chile to keep an eye on the star for the next three years, in order to collect enough data to determine whether or not the next Earthlike planet lies next door.

Such a planet would be too small to see, but its gravity will pull on its host star, making it rock back and forth in a way that the telescope can detect. With NASA funding, they're also working on simulations that may be able to predict how a solar system could have formed around our cosmic neighbor.

I wish them success. Other searches for a planet around the nearest star, Proxima Centauri, have so far yielded nothing — but the quest continues.

You can read the full Planet Quest article here.

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