/sci/ - Science & Math

>>3292582
google.com
wikipedia.org

a gravitational singularity

>>3292586
oh thats cool.

Better question: How does one see a black hole if space is black?

>>3292590
You can look at the center of our galaxy for instance, and see that stars are orbiting something which is unseen, which is what some scientists did.

>>3292590

We can see the effects of it and it can get in front of other objects as seen in OP's picture.

>>3292602

"A black hole cannot be viewed directly because light cannot escape it. Effects on the matter that surrounds it infer its presence. Matter swirling around a black hole heats up and emits radiation that can be detected. Around a stellar black hole this matter is composed of gas and dust. Around a supermassive black hole in the center of a galaxy the swirling disk is made of not only gas but also stars. An instrument aboard the Hubble Space Telescope, called the Space Telescope Imaging Spectrograph (STIS), was installed in February 1997. STIS is the space telescope's main "black hole hunter." A spectrograph uses prisms or diffraction gratings to split the incoming light into its rainbow pattern. The position and strength of the line in a spectrum gives scientists valuable information. STIS spans ultraviolet, visible, and near-infrared wavelengths. This instrument can take a spectrum of many places at once across the center of a galaxy. Each spectrum tells scientists how fast the stars and gas are swirling at that location. With that information, the central mass that the stars are orbiting can be calculated. The faster the stars go, the more massive the central object must be.

STIS found the signature of a supermassive black hole in the center of the galaxy M84. The spectra showed a rotation velocity of 400 km/s, equivalent to 1.4 million km every hour! The Earth orbits our Sun at 30 km/s. If Earth moved as fast as 400 km/s our year would be only 27 days long! "
from http://amazing-space.stsci.edu/resources/explorations/blackholes/teacher/sciencebackground.html#10

>>3292582
A black hole is the visible universe we occupy.

>>3292582

a nigger's asshole

>>3292636
Why is it so rare for black porn actresses to do gape scenes?

A black hole is a celestial object whose mass is great enough that the escape velocity at its surface is at least the speed of light.

All matter has a gravitational pull, as I'm sure you know.

A black hole is an area where there is matter which is VERY densely-packed, so the gravitational pull is extremely strong. It's so strong that nothing, including light, can escape it.

>>3292602

What happens if a black hole reaches maximum capacity or "dies"?

>>3292661
>maximum capacity

No such thing, as far as we know.

>dies

It'll slowly evaporate via hawking radiation over the course of trillions of years as long as it doesn't absorb any new matter. The evaporation will become more rapid as the black hole becomes very small until it finally disappears in a puff of subatomic particles and radiation.

>>3292661
It slowly evaporates away, but eventually all particles will become black holes.

http://www.youtube.com/watch?v=Y-db4iC0aHw