Understanding through Discussion

Welcome! You are not logged in. [ Login ]
EvC Forum active members: 63 (9072 total)
70 online now:
AZPaul3, PaulK, Phat (3 members, 67 visitors)
Newest Member: FossilDiscovery
Post Volume: Total: 893,152 Year: 4,264/6,534 Month: 478/900 Week: 2/182 Day: 2/28 Hour: 0/0

Thread  Details

Email This Thread
Newer Topic | Older Topic
Author Topic:   Star Formation (Star Condensation)
Member (Idle past 4754 days)
Posts: 692
From: Fortaleza-CE Brazil
Joined: 02-18-2006

Message 3 of 33 (390808)
03-22-2007 1:27 AM
Reply to: Message 1 by Hoof Hearted
03-20-2007 8:28 AM

What force could act upon a body of dispersed gas and initiate the process of causing it condense

I can understand perfectly that our sun now holds itself together by gravity. But I would have thought that this force only comes into being when a vast amount of matter is densely packed into an object such as our sun.
You would be wrong, though. Gravity also holds together objects much bigger then stars, like Galaxies

Is it possible that gravity can overcome a gas's attempt to expand even when there is initially no concentrated mass of matter?
ideed it is. But you are right, this is not a trivial question at all. There is the need for some sort of seed (a region that is slightly denser then its neighbourhood). because of that, I gigant cloud of gas can stay stable for very long periods and then go through a period of intense star formation. The point is that once it becomes unstabl, there is no stopping it. the little seeds atract some matter becoming a little bigger, and so forth, until the radiation produced by the newly formed stars dissipates whatever is left of the gas, and the process halts itself

This message is a reply to:
 Message 1 by Hoof Hearted, posted 03-20-2007 8:28 AM Hoof Hearted has taken no action

Newer Topic | Older Topic
Jump to:

Copyright 2001-2018 by EvC Forum, All Rights Reserved

™ Version 4.1
Innovative software from Qwixotic © 2022