Black Holes

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15th January 2008, 01:37pm
#1
by Quasar
Salerno Italy
Member Since: Jul 2007
Member Points: 109

EVEN THIN GALAXIES CAN GROW FAT BLACK HOLES
-------------------------------------------
Like people, galaxies come in different shapes and sizes. There are thin
spirals both with and without central bulges of stars, and more rotund
ellipticals that are themselves like giant bulges. NASA's Spitzer Space
Telescope has detected plump black holes where least expected -- skinny
galaxies.

http://spaceflightnow.com/news/n0801/14thingalaxies/

15th January 2008, 02:42pm
#2
by Knightly
Wisconsin United States
Member Since: Nov 2007
Member Points: 719

Can you tell me more about black holes? They have always fascinated me, but I don't know very much about them. . .

16th January 2008, 12:43pm
#3
by rich
My Home United Kingdom
Member Since: Jul 2007
Member Points: 22903
Black holes have a very strong suction there dangerous.
16th January 2008, 12:58pm
#4
by cmh0114
Utica, MI United States
Member Since: Aug 2007
Member Points: 333
Black holes don't have any suction at all.  Suction is where an object is pulled into something because of a difference in air pressure.  A black hole simply has an incredible amount of mass, giving it an incredible gravitational pull.  The center of a black hole is roughly the size of the nucleus of an atom, and can have hundreds of thousands of solar masses (1 mass of the Sun).  Because of this huge gravitational pull, items within a certain distance cannot escape from a black hole.  That distance is called the event horizon.  Even light can't escape when it's within the event horizon.  Even though light has no mass (at least, no mass as in the generally used term, light has mass because it has momentum, I believe), light is stilled pulled in. 
16th January 2008, 01:01pm
#5
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496

  "Black holes are some of the most mysterious objects in the universe. Imagine yourself standing over a bottomless, pitch black pit. Everything around you was being sucked down into the pit, even the light! Everything that is being pulled into the black hole seems to be moving slower, but is actually gaining speed rapidly until it reaches the edge of the pit, which is called the horizon. This is point of no return- anything that reaches this point will never come out. Then, the object is pulled into the pit, and is also shrinking in size, until it finally collapses into what is called a singularity (a dimensionless object with infinite density)."
-from http://library.thinkquest.org/25763/mindex.htm

actually that's wrong at least the nothing can escapes it part, I thing it's called nero's but those go through everything including the earth!

16th January 2008, 01:02pm
#6
by rich
My Home United Kingdom
Member Since: Jul 2007
Member Points: 22903
So your the space expert.
16th January 2008, 01:04pm
#7
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496
me? no I'm 13 I just look things up...
16th January 2008, 01:16pm
#8
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496

THAT IS SO WRONG!!!!

1. it would be EASY to find "wondering" black holes if thing um? DISAPPEAR!!!

2. that has probably already happened remember? thousands of years for light to get here?

3. there is another form of colasped star that's called a neutron star that creates the light house effect to

4. If the light "bends" as it says it would it would simply disappear

5. NO STARS ARE EVEN CLOSE TO EARTH

must I go on I read the first two paragraphs and that was enough

16th January 2008, 01:35pm
#9
by WhoShotTheSheriff
New Jersey United States
Member Since: Dec 2007
Member Points: 35
There is a star fairly close to Earth. It is called the Sun.
16th January 2008, 01:37pm
#10
by rich
My Home United Kingdom
Member Since: Jul 2007
Member Points: 22903
lol that's a good one.
16th January 2008, 01:58pm
#11
by Quasar
Salerno Italy
Member Since: Jul 2007
Member Points: 109

Light is composed of elementary particles called photons. The photons differ from the other elementary particles beacuse they have zero rest mass.

However, according to the Theory of General Relativity, photons are themselves affected by gravity; their normally straight trajectories may be bent by warped spacetime, as in gravitational lensing. To be more precise, the gravitational field of massive object (such as a galaxy cluster or a black hole) can warp space-time, bending everything in it, including the paths followed by light rays from other sources.


16th January 2008, 01:59pm
#12
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496

still that thing is wrong

16th January 2008, 02:01pm
#13
by Redwall
Uppsala Sweden
Member Since: Aug 2007
Member Points: 288
define close? I think a walk to the train station is fare, and thats 2km the sun is 1495982000  km away (rufly)
16th January 2008, 02:02pm
#14
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496
I still hate the people who post there.....
16th January 2008, 02:09pm
#15
by Quasar
Salerno Italy
Member Since: Jul 2007
Member Points: 109
What is wrong?
16th January 2008, 02:15pm
#16
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496
to people who thought they know things at the rouge thing nothing against last_file for using it though........ yah I just get VERY mad a the people who think they know what there doing when they don't.
16th January 2008, 02:18pm
#17
by neneko
Sweden
Member Since: Dec 2007
Member Points: 1747
shadowslayer, I think you're confusing the milky way with our solar system. There are alot of stars in the milky way. There are no claims in the article that this is happening close to earth.
16th January 2008, 02:22pm
#18
by shadowslayer
Grand Rapids, Michigan United States
Member Since: Nov 2007
Member Points: 1496

...still got a lot wrong.....

16th January 2008, 02:23pm
#19
by 789159
United States
Member Since: Oct 2007
Member Points: 176

A black hole is formed when a dying star above the Chandrakhesar Limit (about 1.5 times the mass of the sun) runs out of fuel and cools down, the stars gravity starts to pull itself inward.  As the star contracts the particles begin to move faster, to avoid hitting each other.  Things must be moving faster and faster to reach escape velocity.  The event horizon is the distance at which nothing not even light can escape the black hole.  The event horizon is formed by the rays of light that just fail to escape the gravitational field.  Instead they circle the black hole forever. 


16th January 2008, 02:24pm
#20
by silentfilmstar13
Medford, OR United States
Member Since: Sep 2007
Member Points: 2143
The black holes are on b5 and d5.
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