Social Media Sidebar


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

When seen through the lens of technology, few resources are truly scarce; they’re mainly inaccessible. 


Peter Diamandis

There are probably 1 to 10 billion earthlike planets in the Milky Way

Posted in Science on 31st Aug, 2015 10:27 PM by AlexMuller

Researchers combine constraints on galaxy formation histories with planet formationmodels, yielding the Earth-like and giant planet formation histories of the Milky Way and the Universe as a whole. In the Hubble Volume, we expect there to be 10^20 Earth like and 10^20 giant planets.


Our own galaxy is expected to host 10^9 and 10^10 Earth-like and giant planets, respectively. Proposed metallicity thresholds for planet formation do not significantly affect these numbers. However, the metallicity dependence for giant planets results in later typical formation times and larger host galaxies than for Earth-like planets.


The Solar System formed at the median age for existing giant planets in the Milky Way, and consistent with past estimates, formed after 80% of Earth-like planets.


However, if existing gas within virialised dark matter haloes continues to collapse and form stars and planets, the Universe will form over 10 times more planets than currently exist.


This shows that we could have at least a 92% chance that we are not the only civilisation the Universe will ever have, independent of arguments involving the Drake Equation.

Tags: spaceplanetHubbleastronomyuniversegalaxyMilky WayEarth

Read original article » Back to category


Author: Guest
Posted: 2015-09-01
Finding many "earth like" planets is far from finding any signs of life and going as far to suggest existence of civilisations is just a provoking statement Reply


Recent headlines

  • Posted in Medicine on 2018-03-17 19:49:27
    A simple artificial heart could permanently replace more
    Posted in Software on 2018-03-16 11:03:28
    60.3% of harmful Android apps in 2017 detected more
    Posted in Hardware on 2018-03-16 11:00:28
    Big harpoon is 'solution to space junk' more
    Posted in Science on 2018-03-16 10:58:40
    Russia will beat NASA to mars and find water on the moon, more
    Posted in Business on 2018-03-14 07:02:30
    X Prize announces $10 million competition to more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs, more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target more

Recent Blog Posts

  • Posted by AlexMuller
    Martian landscapes formed from sand 'levitating' on a more
    Posted by AlexMuller
    Scientists detect comets outside our solar more
    Posted by AlexMuller
    Advanced artificial limbs mapped in the more
    Posted by AlexMuller
    Bacteria have a sense of more
    Posted by AlexMuller
    Recurrent brain cancer: New hope with phase 1 clinical more

Login to your Account

Login to your PlanetTech Account here

Remember me

Create a New Account

You just need username and password

The following errors occured:
Verify password:
Remember me