Galaxy

Unknown “Structures” Not Tugging on the Universe After All?

Publication: National Geographic News   Date: January 20, 2012   View Article

Mysterious, unseen structures on the outskirts of creation most likely aren’t tugging on our universe, according to a new study. The paper reexamines “dark flow”— an unusual, one-way motion of matter —using measurements of supernovae and the existing laws of physics.

In 2008, a team of scientists took measurements of hundreds of galaxy clusters and calculated that everything in the visible universe—and likely beyond—is flowing at 2 million miles (3.2 million kilometers) an hour in the same direction.

The data couldn’t be explained by the distribution of matter in the known universe, so the scientists suggested that chunks of matter had been pushed out shortly after the big bang, and their gravity is now pulling on everything around us.

Help scientists go to the dark side

Publication: NBC News   Date: December 7, 2010   View Article

The universe has a dark side, and an international team of astronomers is calling on scientists and computer geeks of all stripes to help them understand it better.

Mystery Space Object May Be Ejected Black Hole

Publication: National Geographic News   Date: May 7, 2010   View Article

A mystery object in a galaxy far, far away could be a supermassive black hole that got booted from its home galaxy’s center, according to a new study.

Then again, the strange body could be a rare type of supernova or an oddball “midsize” black hole—more massive than black holes born when single stars explode but “lighter” than the supermassive ones at the centers of galaxies.

“All three of those [options] are exotic and have something peculiar to them,” said study co-author Peter Jonker, an astronomer with the Netherlands Institute for Space Research in Utrecht.

New Proof Unknown “Structure” Tug at Our Universe

Publication: National Geographic News   Date: March 22, 2010   View Article

“Dark flow” is no fluke, suggests a new study that strengthens the case for unknown, unseen “structures” lurking on the outskirts of creation.

In 2008 scientists reported the discovery of hundreds of galaxy clusters streaming in the same direction at more than 2.2 million miles (3.6 million kilometers) an hour.

This mysterious motion can’t be explained by current models for distribution of mass in the universe. So the researchers made the controversial suggestion that the clusters are being tugged on by the gravity of matter outside the known universe.

10 signs of a rough and tough universe

Publication: MSNBC.com   Date: August 12, 2009   View Article

The space rock that recently plowed into Jupiter and gave it a black eye the size of the Pacific Ocean served up a not-so-gentle reminder of the rough and tough side of our universe. Check out this and nine more bouts of violence in outer space

Ten views: From Earth to the Universe

Publication: MSNBC.com   Date: January 22, 2009   View Article

Check out ten images featured in “From Earth to the Universe,” one of several projects organized for the International Year of Astronomy. More than 40 countries have announced plans to participate. About 125 space images are available for display in airports, parks and other public places around the world. Some of the images here just might show up at an exhibit near you.

New Milky Way Map Created; Shows Fewer Main Arms

Publication: National Geographic News   Date: June 3, 2008   View Article

Astronomers unveiled today what they are calling the best map ever produced of the Milky Way galaxy. The new view shows our spiral galaxy as it would look face-on to a very distant observer.

© 2008-2010 Collected Writings By John Roach