PDA

View Full Version : hey 2 questions



multisync
2008-Dec-22, 04:40 PM
hey people my first thread/post in this forum. got 2 newbie questions that im wondering about. can black holes ever dissipate or do they go on forever? and where are we located in the milky way? :silenced:

loglo
2008-Dec-22, 05:36 PM
2nd question is easy, You Are Here (http://www.atlasoftheuniverse.com/milkyway.html) :)

antoniseb
2008-Dec-22, 05:44 PM
The first question is that black holes most likely evaporate, but that the really small ones evaporate very quickly, and the really big ones will last what must seem like forever.

BetaDust
2008-Dec-22, 05:58 PM
Hi multisync, Welcome to BAUT.

For your first Question:


can black holes ever dissipate or do they go on forever?

They give of "hawking radiation", And Should, Given enough time, dissipate.
Wikipedia Artikle on Hawking Radiation. (http://en.wikipedia.org/wiki/Hawking_radiation)


For your second Question:


and where are we located in the milky way?

At section 4.4, this Wiki artikle talks about the location of our Solar system.
Wikipedia Artikle on the Milky Way. (http://en.wikipedia.org/wiki/Milky_Way)


Welcome Again.

--Dennis

Tzarkoth
2008-Dec-22, 06:42 PM
I thought we were on the Orion spur of the Perseus arm.

No wonder my last Amazon order never found me.

multisync
2008-Dec-22, 07:54 PM
thanks for the answers :)

GOURDHEAD
2008-Dec-22, 10:02 PM
The first question is that black holes most likely evaporate, but that the really small ones evaporate very quickly, and the really big ones will last what must seem like forever.Have those who study black holes in detail discovered whether there are, from theoretical considerations, sets of attributes that allow approaching black holes to provide mutual gravitational assists such that each is "unravelled", or whether electromagnetic forces could be applied to disassemble them? Set aside for now whether the engineering is doable with current technology. If they can be made to unravel, what particle mix should we expect in the ejecta?