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

We are all now connected by the Internet, like neurons in a giant brain.

 

Stephen Hawking

 

Dark matter could be seen in GPS time glitches

RATE THIS! +23
Posted in Science on 19th Nov, 2014 10:26 PM by AlexMuller

Dark matter makes up 80 per cent of the universe's matter but scarcely interacts with ordinary matter. A novel particle is the most popular candidate, but Andrei Derevianko and Maxim Pospelov at the Perimeter Institute in Waterloo, propose that kinks or cracks in the quantum fields that permeate the universe could be the culprit.

 
If they are right, fundamental properties such as the mass of an electron or the strength of electromagnetic fields would change at the kinks. "The effect is essentially locally modifying fundamental constants," Derevianko says. Clocks would be affected too, measuring time slightly differently as a result.
 
That's where GPS comes in. The network of satellites is about 50,000 kilometres in diameter, and is travelling through space, along with the entire solar system, at about 300 kilometres a second. So any time shift when the solar system passes through a cosmic kink will take a maximum of 170 seconds to move across network.
 
Other things could perturb GPS timekeeping, but only a signal from dark matter would have that signature, say Derevianko and Pospelov. Derevianko is already mining 15 years' worth of GPS timing data for dark matter's fingerprints. If he doesn't find anything, he plans to continue the search using the Network for European Accurate Time and Frequency Transfer (NEAT-FT), a network of ground-based atomic clocks that is under construction in Europe. Each of these clocks is far more sensitive than a satellite clock.
 
If the cosmic kink idea is right, we could also search for dark matter using pulsars, the rapidly spinning corpses of stars that exploded as supernovae. Pulsars emit beams of electromagnetic radiation that hit Earth with periods that can be more precise than our best clocks. "There's a tantalising hint from pulsar data," says Derevianko. "These are like atomic clocks, highly regular."

Tags: GPSdark matterspacesatelliteclock

Read original article » Back to category

Comments

Author: Guest
Posted: 2014-11-20
+1
It is great to see relative new global technology reaching new applications and cutting edge science! Well done Reply


 

Recent headlines

  • Posted in Software on 2017-06-23 12:32:59
    Google’s AI subsidiary DeepMind is partnering with.....read more
    Posted in Science on 2017-06-23 12:40:53
    Likely Mars sized planet at two times the distance to.....read more
    Posted in Science on 2017-06-23 12:14:38
    Queen's Speech: Plan aims to secure space sector..read more
    Posted in Hardware on 2017-06-22 04:47:33
    Google can turn an ordinary PC into a deep learning machine..read more
    Posted in Science on 2017-06-22 04:38:36
    Musk Wants SpaceX’s Trips To Mars To Be Like Riding.....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
    Nanoparticle vaccine shows potential as immunotherapy to fight.....read more
    Posted by AlexMuller
    Obesity is top cause of preventable life-years lost, study shows..read more
    Posted by AlexMuller
    Light can be utilized to control gene function..read more
    Posted by AlexMuller
    Brain stimulation restores memory during lapses, research shows..read more
    Posted by AlexMuller
    Wax worm caterpillar will eat plastic shopping bags: New.....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