By the River

Jan 9, 2009 at 6:56 PM
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By the River

(Sunica Markovic)

MP3 play whole song, hi-fi (broadband)

SUNICA MARKOVIC: Mysterious Mountain

Properties

A black hole forms when an object's gravitational field is too powerful for light to escape. Once this happens, many details about the object -- its composition, for example -- become irrelevant. The simplest kind of black hole does not rotate, and all its properties are determined by just one thing: its mass.

A simple black hole of mass M has a radius R_S ∝ M known as the Schwarzschild radius or the horizon radius. A ray of light launched upward from this radius can just barely escape the gravity of the black hole. Nothing inside this radius can get out; this region cannot influence the rest of the universe in any way.

At the center of a non-rotating black hole is a singularity -- a point where gravity becomes infinitely strong. Everything within the Schwarzschild radius is pulled into the singularity and destroyed.

Critical Orbits

The smallest possible circular orbit around a black hole has a radius of 1.5 R_S. Light is the only thing fast enough to actually travel in this orbit, so this radius is called the photon sphere. Anything which comes within photon sphere will eventually fall into the hole unless it uses rocket power to escape.

The smallest orbit which is stable, meaning that small departures from a perfect circle are allowed, has a radius of 3 R_S.

Schematic of a black hole

Rotating Black Holes

Most black holes probably (?!...><?@$#^%) rotate. A rotating black hole has a flattened region, the ergosphere, in which nothing can remain at rest; the hole's rotation drags space with it.

Rotating black hole [Wikipedia]

In a rotating black hole the singularity is a ring instead of a point. Theoretically, it's possible to fall through this ring and avoid being shredded by infinite gravitational forces. We're not sure what happens next.

BH mass vs bulge mass

10 Replies | 116 Views

RE: image ...chromatic scale c-b

http://www.sunicamarkovic.com/music.html

c#-w-d#-w-e#-w-f##-w-g## = wwww ....I-II-III-IV-V

d-e-f#-g#-a# = wwww ....I-II-III-IV-V
------>
<------

also:
Pentatonic scale
c#-d# ----->
<------f#-G#-A#

http://www.librarising.com/esoterica/chakras.html

http://www.ifa.hawaii.edu/~barnes/ast110_06/bhaq.html#[6]