Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

People say we're running out of energy. That's only true if we stick with these old 19th century technologies. We are awash in energy from sunlight.

 

Ray Kurzweil

 

Earth size planets in habitable zones are more common than previously thought

RATE THIS! +7
Posted in Science on 12th Mar, 2013 11:06 PM by AlexMuller

A Penn State researcher says that the number of Earth-size planets in habitable zones is greater than previously thought and a few of these planets may be orbiting nearby stars.

 

Ravi Kopparapu, a post-doctoral researcher in geosciences, described his findings in a paper accepted for publication in Astrophysical Journal Letters.

 

“We now estimate that if we were to look at 10 of the nearest small stars we would find about four potentially habitable planets, give or take,” said Kopparapu. “That is a conservative estimate. There could be more.”

 

Kopparapu recalculated the number of Earth-size planets in the habitable zones of small stars, also known as cool stars or M-dwarfs. The habitable zone is defined as the area where conditions might potentially support life.

 

The orbit of planets around M-dwarfs is extremely short, which helps scientists obtain data on a greater number of orbits in a shorter period of time than can be amassed on Sun-like stars, which have bigger habitable zones. M-dwarfs are also more common than stars like our Sun.

 

“The average distance to the nearest potentially habitable planet is about seven light years. That is about half the distance of previous estimates,” Kopparapu said. “There are about eight cool stars within 10 light-years, so conservatively, we should expect to find about three Earth-size planets in the habitable zones.”

 

A recent study by researchers at the Harvard-Smithsonian Center for Astrophysics examined 3,987 M-dwarf stars to determine the number of Earth-sized planet candidates in cool stars’ habitable zones. Kopparapu discovered that the study’s findings, based on data from NASA’s Kepler satellite, didn’t take into consideration the most recent estimates for identifying whether planets are located within a habitable zone.

 

These newer estimates are based on an updated model created by Kopparapu and colleagues, utilizing information on water and carbon dioxide absorption that was not available to researchers at the Harvard-Smithsonian Center for Astrophysics in 1993. Kopparapu applied the newer estimates to the Harvard team’s study and discovered that there are additional planets in the newly determined habitable zones.



Read original article » Back to category

Comments



 

Recent headlines

  • Posted in Software on 2017-09-19 18:06:17
    China orders Bitcoin exchanges in capital city to close..read more
    Posted in Hardware on 2017-09-19 18:00:15
    LinkSpace is a Chinese startup that will try to make.....read more
    Posted in Medicine on 2017-09-19 17:54:24
    A Permanent Vaccine Against Tooth Cavity and Decay..read more
    Posted in Software on 2017-09-18 18:14:00
    China to become artificial intelligence 'world leader' by.....read more
    Posted in Science on 2017-09-18 18:10:24
    There's an Ocean Deep Inside the Earth..read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Scientists probe Neptune's depths to reveal secrets of icy.....read more
    Posted by AlexMuller
    New terahertz imaging approach could speed up skin cancer.....read more
    Posted by AlexMuller
    Rebutting the claim that antidepressants do not work..read more
    Posted by AlexMuller
    Artificial neural networks decode brain activity during.....read more
    Posted by AlexMuller
    Four Earth-sized planets detected orbiting the nearest.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me