Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Huge Hole Found in the Universe
08-25-2007, 06:38 PM,
Huge Hole Found in the Universe
Huge Hole Found in the Universe
By Robert Roy Britt
Senior Science Writer
posted: 23 August 2007
05:21 pm ET

link -

The universe has a huge hole in it that dwarfs anything else of its kind. The discovery caught astronomers by surprise.

The hole is nearly a billion light-years across. It is not a black hole, which is a small sphere of densely packed matter. Rather, this one is mostly devoid of stars, gas and other normal matter, and it's also strangely empty of the mysterious "dark matter" that permeates the cosmos. Other space voids have been found before, but nothing on this scale.

Astronomers don't know why the hole is there.

"Not only has no one ever found a void this big, but we never even expected to find one this size," said researcher Lawrence Rudnick of the University of Minnesota.

Rudnick's colleague Liliya R. Williams also had not anticipated this finding.

"What we've found is not normal, based on either observational studies or on computer simulations of the large-scale evolution of the universe," said Williams, also of the University of Minnesota.

The finding will be detailed in the Astrophysical Journal.

The universe is populated with visible stars, gas and dust, but most of the matter in the universe is invisible. Scientists know something is there, because they can measure the gravitational effects of the so-called dark matter. Voids exist, but they are typically relatively small.

The gargantuan hole was found by examining observations made using the Very Large [quote] (VLA) radio telescope, funded by the National Science Foundation.

There is a "remarkable drop in the number of galaxies" in a region of sky in the constellation Eridanus, Rudnick said.

The region had been previously been dubbed the "WMAP Cold Spot," because it stood out in a map of the Cosmic Microwave Background (CMB) radiation made by NASA's Wilkinson Microwave Anisotopy Probe (WMAP) satellite. The CMB is an imprint of radiation left from the Big Bang, the theoretical beginning of the universe.

"Although our surprising results need independent confirmation, the slightly colder temperature of the CMB in this region appears to be caused by a huge hole devoid of nearly all matter roughly 6 to 10 billion light-years from Earth," Rudnick said.

Photons of the CMB gain a small amount of energy when they pass through normal regions of space with matter, the researchers explained. But when the CMB passes through a void, the photons lose energy, making the CMB from that part of the sky appear cooler.
Vitam Impendere Vero

Possibly Related Threads...
Thread Author Replies Views Last Post
  Ancient Destructions - Electric Universe Series vagabonder 0 699 05-03-2014, 05:56 PM
Last Post: vagabonder
  Electric Universe Watchdog 8 1,593 01-28-2014, 03:52 AM
Last Post: April
  Primer Fields Pt. 1 - Torus Universe Krise 11 1,780 02-14-2013, 11:02 AM
Last Post: Krise
  Huge circles on satellite weather pictures Australia and now Germany Hans Olo 23 7,777 02-06-2013, 09:25 PM
Last Post: CharliePrime
  HUGE media blackout regarding Earth and Moon orbital changes? Deathaniel 0 706 10-22-2010, 10:09 PM
Last Post: Deathaniel
  Time of the Universe is slowing down drew hempel 0 877 07-29-2010, 08:10 PM
Last Post: drew hempel
  Second chance for Large Hadron Collider to deliver universe's secrets drummer 1 989 12-05-2009, 11:30 PM
Last Post: kingamoth
  First black hole for light created on Earth --- 0 817 10-15-2009, 01:08 AM
Last Post: ---
  Faulty Brain Connections Found Within the Brains of Psychopaths yeti 10 2,019 08-12-2009, 12:58 PM
Last Post: ---
  Possible site of free will found in brain --- 0 561 05-09-2009, 12:25 AM
Last Post: ---

Forum Jump:

Users browsing this thread: 1 Guest(s)