Supernova

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.

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.

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

Ancient rock art from around the world

Publication: MSNBC.com   Date: March 23, 2009   View Article

Even 15,000 years ago, humans were compelled to decorate the interior walls of their abodes. Back then – the Stone Age – home was often no more than a cave, but the artwork was sophisticated and sublime. Check out eight examples of rock art from around the world.

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.

Colliding Dead Stars Set Off Massive Supernova

Publication: National Geographic News   Date: November 5, 2007   View Article

Two small but dense burned-out stars appear to have spiraled into each other and exploded, according to a new study.

The blast offers some of the strongest evidence yet for a theoretical model for supernovas created by white dwarfs—the hot cores left behind when stars similar to our sun die.

Photo in the News: Chandra Solves Supernova Mystery

Publication: National Geographic News   Date: January 11, 2007   View Article

The most detailed x-ray image yet of one of the youngest known supernova remnants—the debris cloud created when a massive star explodes—solves a long-standing mystery about how the star died, an astronomer announced on Tuesday.

© 2008-2010 Collected Writings By John Roach