This site is not maintained. Click here for the new website of Richard Dawkins.

Vast Structure of Satellite Galaxies & Star Clusters Discovered Surrounding Milky Way --Nixes Existence of Dark Matter in Universe

Astronomers from the University of Bonn in Germany have discovered a vast structure of satellite galaxies and clusters of stars surrounding our Galaxy, stretching out across a million light years. The work challenges the existence of dark matter, part of the standard model for the evolution of the universe.

Conventional models for the origin and evolution of the universe (cosmology) are based on the presence of ‘dark matter’, invisible material thought to make up about 23% of the content of the cosmos that has never been detected directly. In this model, the Milky Way is predicted to have far more satellite galaxies than are actually seen.

In their effort to understand exactly what surrounds our Galaxy, the scientists used a range of sources from twentieth century photographic plates to images from the robotic telescope of the Sloan Deep Sky Survey. Using all these data they assembled a picture that includes bright ‘classical’ satellite galaxies, more recently detected fainter satellites and the younger globular clusters.

“Once we had completed our analysis, a new picture of our cosmic neighborhood emerged”, says team leader Marcel Pawlowski. The astronomers found that all the different objects are distributed in a plane at right angles to the galactic disk. The newly-discovered structure is huge, extending from as close as 33,000 light years to as far away as one million light years from the center of the Galaxy.

“We were baffled by how well the distributions of the different types of objects agreed with each other," added Pavel Kroupa, professor for astronomy at the University of Bonn. "As the different companions move around the Milky Way, they lose material, stars and sometimes gas, which forms long streams along their paths. The new results show that this lost material is aligned with the plane of galaxies and clusters too. “This illustrates that the objects are not only situated within this plane right now, but that they move within it”, says Pawlowski. “The structure is stable.”
Read more

TAGGED: SPACE


RELATED CONTENT

Nasa's Curiosity rover zaps Mars rock

Jonathan Amos - BBC News Comments

Pew pew pew pew

Sun Is Roundest Natural Object Known

Dave Mosher - National Geographic Comments

The sun is the roundest natural object ever precisely measured, astronomers say.

Astrophysicists simulate 14 billion...

Liat Clark - Wired.co.uk Comments

Astrophysicists simulate 14 billion years of cosmic evolution in high resolution

Mars rover searching for signs of life

Lawrence Krauss - CNN Comments

Author and theoretical physicist Lawrence Krauss, discusses what it would be like if we found life on another planet.

'Plate Tectonics' Discovered on...

- - The Daily Galaxy Comments

Mars Science Laboratory Touches Down...

Sean Carroll - Cosmic Variance -... Comments

Launched on November 26, 2011, the mission is scheduled to land on Mars’s Gale Crater tonight/tomorrow morning: 5:31 UTC, which translates to 1:30 a.m. Eastern time or 10:20 p.m. Pacific.

MORE

MORE BY -

Viewpoints: Why is faith falling in the...

- - BBC News Comments

A new poll suggests that atheism is on the rise in the US, while those who consider themselves religious has dropped. What's the cause? Two writers debate.

Missionaries of Hate

- - Top Documentary Films Comments

Documentary about ongoing events in Uganda, where many question whether the growing influence of American religious groups has led to a movement to make homosexuality a crime punishable by death.

Scientists Discover Previously Unknown...

- - URMC Comments

Newer Imaging Technique Brings ‘Glymphatic System’ to Light

Blasphemy Laws Exposed: The...

- - human rights first Comments

Blasphemy Laws Exposed: The Consequences of Criminalizing “Defamation of Religions”

Atheists On Religion, Science, And...

- - YouTube - townsquare Comments

Cara Santa Maria (Senior Science Correspondent, Huffingtonpost.com) leads this week's panel on 'The Point' to discuss these issues and more with Michael Shermer (Publisher - Skeptic Magazine), Sean Carroll (Theoretical Physicist - Caltech), and Edward Falzon (author of 'Being Gay Is Disgusting').

WALK DARWIN’S TREE OF LIFE ~ 25 - 26...

- - Ancestors Trail Walk Comments

WALK DARWIN’S TREE OF LIFE ~ 26 AUGUST 2012 - event begins on Saturday 25 August

MORE

Comments

Comment RSS Feed

Please sign in or register to comment