substance which glues universe together may not exist
Tuesday 21 January 2025
Last Updated : GMT 09:03:51
Almaghrib Today, almaghrib today

'Dark matter' theory enigma after star scan

Substance which glues universe together may not exist

Almaghrib Today, almaghrib today

Almaghrib Today, almaghrib today Substance which glues universe together may not exist

Dark matter is thought to form a 'halo' around galaxies
London - Arabstoday

Dark matter is thought to form a 'halo' around galaxies 'Dark matter' - the mysterious substance thought to 'glue' the universe together - might not exist, throwing current theories of the universe into chaos. 'Dark matter' is thought to make up around 83% of the universe by mass - and to 'hold together' galaxies - but a scan of 400 stars near our Sun found no trace of it.
The study, using the La Silla telescope in Chile, is the biggest of its type ever conducted.
Dozens of scientific projects on Earth are searching for dark matter, many using detectors buried deep under ground in mines - but the Chilean scientists say they are unlikely to find it.
The most accurate study so far of the motions of stars in the Milky Way has found no evidence for dark matter in a large volume around the Sun.
A team using the MPG/ESO 2.2-meter telescope at ESO’s La Silla Observatory, along with other telescopes, has mapped the motions of more than 400 stars up to 13,000 light-years from the Sun.
From this new data they have calculated the mass of material in the vicinity of the Sun, in a volume four times larger than ever considered before.
‘The amount of mass that we derive matches very well with what we see -- stars, dust and gas -- in the region around the Sun,’ says team leader Christian Moni Bidin, of the Universidad de Concepcion, Chile.
‘But this leaves no room for the extra material -- dark matter -- that we were expecting. Our calculations show that it should have shown up very clearly in our measurements. But it was just not there!’
‘Despite the new results, the Milky Way certainly rotates much faster than the visible matter alone can account for. So, if dark matter is not present where we expected it, a new solution for the missing mass problem must be found.'
Our results contradict the currently accepted models. The mystery of dark matter has just become even more mysterious. Future surveys, such as the ESA Gaia mission, will be crucial to move beyond this point.’ concludes Christian Moni Bidin.
Dark matter is a mysterious substance that cannot be seen, but shows itself by its gravitational attraction for the material around it.
This extra ingredient in the cosmos was originally suggested to explain why the outer parts of galaxies, including our own Milky Way, rotated so quickly, but dark matter now also forms an essential component of theories of how galaxies formed and evolved.
Today it is widely accepted that this dark component constitutes about the 80% of the mass in the universe, despite the fact that it has resisted all attempts to clarify its nature, which remains obscure. All attempts so far to detect dark matter in laboratories on Earth have failed.
Bvery carefully measuring the motions of many stars, particularly those away from the plane of the Milky Way, the team could work backwards to deduce how much matter is present. The motions are a result of the mutual gravitational attraction of all the material, whether normal matter such as stars, or dark matter.
Astronomers’ existing models of how galaxies form and rotate suggest that the Milky Way is surrounded by a halo of dark matter. They are not able to precisely predict what shape this halo takes, but they do expect to find significant amounts in the region around the Sun.
But only very unlikely shapes for the dark matter halo -- such as a highly elongated form -- can explain the lack of dark matter uncovered in the new study.

almaghribtoday
almaghribtoday

Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

substance which glues universe together may not exist substance which glues universe together may not exist

 



Name *

E-mail *

Comment Title*

Comment *

: Characters Left

Mandatory *

Terms of use

Publishing Terms: Not to offend the author, or to persons or sanctities or attacking religions or divine self. And stay away from sectarian and racial incitement and insults.

I agree with the Terms of Use

Security Code*

substance which glues universe together may not exist substance which glues universe together may not exist

 



Almaghrib Today, almaghrib today Skincare PR Performance Full Year 2017

GMT 09:22 2018 Monday ,22 January

Skincare PR Performance Full Year 2017
Almaghrib Today, almaghrib today New hunt for flight MH370 gets under way

GMT 11:03 2018 Wednesday ,24 January

New hunt for flight MH370 gets under way
Almaghrib Today, almaghrib today Modern colorful bedroom renovation

GMT 10:57 2017 Thursday ,21 December

Modern colorful bedroom renovation
Almaghrib Today, almaghrib today Puigdemont candidate for Catalan president

GMT 13:56 2018 Tuesday ,23 January

Puigdemont candidate for Catalan president
Almaghrib Today, almaghrib today Turkey detains dozens more

GMT 10:47 2018 Wednesday ,24 January

Turkey detains dozens more

GMT 17:21 2018 Monday ,08 January

Play abandoned in South Africa v India Test

GMT 10:32 2016 Monday ,21 March

To arson that killed Palestinian family

GMT 08:15 2017 Monday ,23 October

Regal Ronaldo tipped for Best FIFA award

GMT 23:53 2017 Saturday ,29 April

Army targets Saudi sites in Najran

GMT 10:24 2012 Tuesday ,14 February

Packard Bell OneTwo L review

GMT 15:53 2017 Wednesday ,28 June

EU fines Google a record $2.72 billion

GMT 10:45 2017 Saturday ,09 September

AkzoNobel seeks to keep shareholders sweet

GMT 10:10 2014 Monday ,04 August

'I will never abandon' Down's baby

GMT 07:55 2017 Monday ,19 June

Award-winning authors take

GMT 09:45 2017 Thursday ,12 January

Asma Lamrabet: Morocco's Muslim feminist polymath

GMT 08:23 2017 Tuesday ,26 September

Rice paper artisans roll with tradition

GMT 10:00 2018 Friday ,19 January

Dreaming of Augusta in Abu Dhabi

GMT 11:14 2014 Saturday ,04 January

\'Flashes of thought\' tops best selling 2013

GMT 12:51 2018 Wednesday ,17 January

Sudan police beat protesters at demo

GMT 09:18 2018 Monday ,15 January

Iraq PM heads for May elections after defeating IS
Almaghrib Today, almaghrib today
 
 Almaghrib Today Facebook,almaghrib today facebook  Almaghrib Today Twitter,almaghrib today twitter Almaghrib Today Rss,almaghrib today rss  Almaghrib Today Youtube,almaghrib today youtube  Almaghrib Today Youtube,almaghrib today youtube

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2021 ©

.almaghribtoday .almaghribtoday .almaghribtoday .almaghribtoday
almaghribtoday almaghribtoday almaghribtoday
almaghribtoday
بناية النخيل - رأس النبع _ خلف السفارة الفرنسية _بيروت - لبنان
almaghribtoday, Almaghribtoday, Almaghribtoday