Category: Main/Black Holes


Sort Links by: Title (A\D) Date (A\D) Rating (A\D) Popularity (A\D)
Sites currently sorted by: Title (A to Z)


Black hole information loss 
Description:
These are astronomically long time scales. I can tell you the answer for any black hole. ;-) Let me focus on the 3+1-dimensional ones. You compute its radius (or mass) in Planck units - Planck mass is 10^-5 grams, Planck length is 10^-35 meters. Then you take the cubed power of this number, and interpret the number in Planck units of time (10^-43 seconds) again to determine the lifetime. For example, 1 meter black hole is 10^35 Planck lengths in radius, i.e. 10^105 Planck times is the evaporation time which is roughly 10^62 seconds - certainly a huge time scale. Of course, we won't be able to wait until a black hole like that evaporates. However if we found such a black hole, we could still observe its evaporation.

Added on: 22-Jan-2005 Hits: 537
Rate this Site | Details

Properties of black holes 
Description:
What is a black hole like? How were they first discovered? How do astronomers know if they're seeing one?

Added on: 09-Jan-2005 Hits: 829
Rate this Site | Details

Stephen Hawking's Universe: Strange Stuff Explained 
Description:
A massive star starts to collapse when it exhausts its nuclear fuel and can no longer counteract the inward pull of gravity. The crushing weight of the starís overlying layers implodes the core, and the star digs deeper into the fabric of space-time. Although the star remains barely visible, its light now has a difficult time climbing out of the enormous gravity of the still-collapsing core. The star passes through its event horizon and disappears from our universe, forming a singularity of infinite density.

Added on: 07-Jan-2005 Hits: 751
Rate this Site | Details

The Importance of Being Nothingness 
Description:
Scientists banter endlessly these days about The Mysterious Vacuum. Like aliens in a crackpot conspiracy theory, the vacuum seems to be connected to everything: dark energy, dark matter, the anthropic principle, parallel universes (or multiverses), the theory of everything, black holes, extra dimensions, gravitational waves, you name it. Everything is connected to Nothing is connected to Everything. The surreal wordplay of confusing jargon makes you wonder: Is there any There there?

Added on: 22-Jan-2005 Hits: 585
Rate this Site | Details

 

Who's Online

There are currently, 36 guest(s) and 0 member(s) that are online.

You are an Anonymous user. You can register for free by clicking here
 

Donate O Meter

HELP KEEP OUR SERVERS ONLINE!
Make donations with PayPal!
Donat-o-Meter Stats

November´s Goal: $77.00
Due Date: Nov 30
Amount in: $0.00
Balance: $0.00
Left to go: $77.00

Donations
 

Information


 

Powered by RavenNuke(tm)


 

 

Googlebot & SEQ stats

Yahoo bot last visit powered by MyPagerank.NetMsn bot last visit powered by MyPagerank.Net