Black Hole

[Airforce]

the Black Hole doesnt act like it should the dust should sprial down to it then get pushed up and down

[Dan Dixon]

A black hole is something with lots of mass which means that its gravitational pull is pretty intense.

I don't follow exactly what you're asking. The dust should spiral?

Objects will orbit or spiral in toward an object if they have the right initial velocity. Is that what you mean?

[Linkz]

The problem here is, if Dan could say exactly what IS a Black Hole, he would be receiving a Nobel Prize as we speak. Basically in Universe Sandbox, the Black Hole is nothing but a body with A LOT of mass, thus, generating A LOT of gravitational force. But the true nature of Black Holes is unknown to mankind 

[Dan Dixon]

Check out Wikipedia's article on Black Holes:
http://en.wikipedia.org/wiki/Black_hole#Sizes

You can set bodies to the Schwarzschild radius by hovering your mouse over them and pressing Ctrl-W (key combo subject to change in a future release).
http://en.wikipedia.org/wiki/Schwarzschild_radius

This sets the escape velocity at the surface of the object to the speed of light.

Black Holes have no theoretical minimum or maximum size. (Someone please correct me if this statement, or any that I make, is incorrect. Thanks.)

[ruletheuniverse!]

black holes are a caticlismic event where a high-massed star explodes into a supernova and collaspses upon it's own density. creating a object smaller the one-tenth of the period at the end of this sentance. but they have EXTREME DENSITY, for example, electromagnetic energy (visible light) has a top speed of a est. of 180,000,000 miles per second. but it can not escape the gravitational pull of a black hole. so it is sucked in to the nothingness. well acually we do not know what this "nothingness" is exactly. and the fact that black holes distort the speed of time in their event horizon, even baffles all facts. so in other words black hole remain unexplained to the human knowledge   
 
                                                                         Reply by: jll

                                                   

[atomic7732]

electromagnetic energy can be any light micrwaves, radio, x, gamma, ultarviolet, and infrared too.

[avadod]

a pulse star is kind of like a black hole

[Dan Dixon]

What is a Pulsar?
Pulsars are highly magnetized, rotating neutron stars that emit a beam of electromagnetic radiation.
http://en.wikipedia.org/wiki/Pulsar

What is a Neutron Star?
A neutron star is a type of remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event.
http://en.wikipedia.org/wiki/Neutron_star

[monmarfori]

Here are the types of black hole:
Stellar-mass black holes: 10 Mega Suns
Intermediate-mass black hole: 10^3 Mega Suns
Supermassive black hole: 10^5 to 10^18 Mega Suns
i made a video using camstudio and uploaded it on youtube
i orbited the black holes sorry for the Intermediate-mass black hole's orbit because its not fit for the video

http://www.youtube.com/watch?v=AfO6ncMKpn4

[atomic7732]

Here are the types of black hole:
Stellar-mass black holes: 10 Mega Suns
Intermediate-mass black hole: 10^3 Mega Suns
Supermassive black hole: 10^5 to 10^18 Mega Suns

What's a MEga Sun? I thought it was your exact stuff without Mega.

[monmarfori]

But Mega is equal to M or Million

[atomic7732]

But Mega is equal to M or Million

Oh... but, i don't think that's right. (remember I said THINK, so I could be wrong) I know planetary mass is <1 Earth to about 1 Sun or something, so theres a gap.

[Dan Dixon]

Mega = M = 1000000 = 1 million

http://en.wikipedia.org/wiki/Mega-

In Universe Sandbox you'll see the use of M. It means 1 million.

I'm not sure that this is totally correct notation, but it makes it easy to grasp and understand:

example:
20 M kg
vs
20000000 kg

[FGFG]

the best notation is the scientific

20000000 = 20*10^6 or 2*10^7

but it is easier to read the "pc" notation (K = 1000, M = 1'000'000, G 1'000'000'000 ecc) because we use it every day (Megabyte, Gigabyte, Kilometer ecc...)