Dark Energy

Unknown “Structures” Tugging at Universe, Study Says

Publication: National Geographic News   Date: November 5, 2008   View Article

Something may be out there. Way out there.

On the outskirts of creation, unknown, unseen “structures” are tugging on our universe like cosmic magnets, a controversial new study says.

Perfectly Aligned Galaxies Found For the First Time

Publication: National Geographic News   Date: January 11, 2008   View Article

Astronomers have found three galaxies in a never before seen perfect alignment—a discovery that may help scientists better understand the mysterious dark matter and dark energy believed to dominate the universe.

The three galaxies are like beads on a string, one directly behind the other, scientists announced yesterday at a meeting of the American Astronomical Society in Austin, Texas.

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.

“Dark Side” of Universe Is Coming to Light

Publication: National Geographic News   Date: June 19, 2003   View Article

For centuries astronomers have trained their gaze on the matter that brightens the universe: the moon, the planets, the stars, and the galaxies. But these bright spots only comprise four percent of the cosmos.

The rest is seemingly a void, nothing but darkness. But the darkness is not empty: It is filled with dark matter and dark energy that has, over the course of the 14 billion years since the big bang, molded the universe into the dynamic structure and shape it holds today. The big bang is the name given to the theory that the universe started with a single cosmic explosion.

© 2008-2010 Collected Writings By John Roach