h2g2 The Hitchhiker's Guide to the Galaxy: Earth Edition

I'll do it.

"In a rotating black hole, the ergosphere is associated with the stationary limit, the location at which space-time is flowing at the speed of light, making stationary particles that would be travelling at the speed of light. Within the stationary limit, no particles can remain at rest, even though they are outside the event horizon."

http://astrosun2.astro.cornell.edu/academics/courses//astro201/ergosphere.htm

"The region of a rotating Kerr black hole between the static surface and the event horizon."

http://www.daviddarling.info/encyclopedia/E/ergosphere.html

Nothing about swirling gas.

...the book I have(as well as encarta) are a bit hazy so that is probably where the problem lies...

okay...where did that just post...I swear I posted a link to an encarta entry...I'll post it again...
http://encarta.msn.com/encyclopedia_761558067/Black_Hole.html#p2

Original question:

Since i was vague about said disk and only clarified later i'm going to go ahead and give it to you.

"The black-hole concept was developed by the German astronomer Karl Schwarzschild in 1916 on the basis of physicist Albert Einstein’s general theory of relativity. The radius of the horizon of a Schwarzschild black hole depends only on the mass of the body, being 2.95 km (1.83 mi) times the mass of the body in solar units (the mass of the body divided by the mass of the Sun). If a body is electrically charged or rotating, Schwarzschild’s results are modified. An “ergosphere” forms outside the horizon, within which matter is forced to rotate with the black hole; in principle, energy can be emitted from the ergosphere."

Well you got it. The term i was thinking of was "acreation disk." Although i think i misspelled.

...in hind sight I should have answered "Bob"...anywho...let's see...I really don't feel like repeatedly saying "no"...so I'll go with astronomy off of the top of my head...and just to make it slightly more difficult...it'll be a two parter

What is the atmosphere of the sun called(as in the outermost layer) AND what is the true name for our sun?

1. photosphere
2. Sol

okay...well...apearently what I was thinking of must be the outermost layer of the sun as the name photosphere rings a bell...

oh and you basically got it...

My question. Lets stick with the boring astronomy questions as we seem to be the only people still here.

Q: Define "redshift" in terms of astronomy.

oohooohoohoo....I know this one as it is the basis of my cloaking idea...and I'm going to be overly technical about it too!
Red shift is an effect caused by the change it electromagnetic wave frequence that is cause by the movement of a light source away from an observer(usually a supernova <I believe specifically a Type 'S' supernova...or a type 'T'...I can't remember the classification system for them...it was in a discover magazine)...the effect is used to measure the outward expansion of the universe...and does so relatively accurately...

oh and just as an even more over the top addition...this is an example of the dopler effect refered to most often in the context of sound waves...

okay...let's step this up one notch...

Q: How many types (including subdivisions) of stars are there acording to the spectral classification system

You are correct.

...so as for my...just to officially ask it:

Q: How many types (including subdivisions) of stars are there acording to the spectral classification system

'dave' that is if you use the base-name counting system rather than base-10, base-8 or any other common numerical base

I liked the zelda questions from last year

they were not so hard