Black holes, hiding or not real

[trevorjohnson83]

They say the bright center of a galaxy is a black hole. That sentence seems contradictory. Why would a black hole emit bright radiation like a star? How does the matter that reflects this radiation in the center avoid the black hole's gravity?

 

[shockedcanadian]

I woke up with onw of my migraine headaches. This question could make it worse.

 

[Carl in Michigan]

They say the bright center of a galaxy is a black hole. That sentence seems contradictory. Why would a black hole emit bright radiation like a star? How does the matter that reflects this radiation in the center avoid the black hole's gravity?

That's not whats going on. The only thing you can SEE about a black hole is the activity taking place above the event horizon

We Finally Know How Black Holes Produce The Most Brilliant Light in The Universe

For something that emits no light that we can detect, black holes just love to cloak themselves in radiance.

www.sciencealert.com

 

[trevorjohnson83]

That's not whats going on. The only thing you can SEE about a black hole is the activity taking place above the event horizon

We Finally Know How Black Holes Produce The Most Brilliant Light in The Universe

For something that emits no light that we can detect, black holes just love to cloak themselves in radiance.

www.sciencealert.com

So at the event horizon the speed of light would be free and we can see it again? How fast is the light just outside the EH?

 

[the other mike]

They say the bright center of a galaxy is a black hole. That sentence seems contradictory. Why would a black hole emit bright radiation like a star? How does the matter that reflects this radiation in the center avoid the black hole's gravity?

Neil Peart said they're real .
Good enough for me.
Rest in peace sir.....

 

[ReinyDays]

Black holes are artifacts of our human perception ... a place-holder for something we don't understand ... yet ...

We know of neutron stars that are small enough that light escapes and we can study these objects based on the light we receive ... we can only assume they get big enough to trap light and create what our human eyes perceive as a hole that's completely black ... we can't see inside, so we cannot say with any certainty that this minimal Black Hole is a larger neutron star ...

... or if the matter within has changed into yet another state-of-matter more compact than a neutron star ...

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Don't hold your breath ... but the LIGO Experiment was wildly successful ... Gravity Waves are real and we can measure them ... a whole new science reading and interpreting these new avenues of information ... here's a great example, Black Holes are artifacts of electromagnetism only, it appears they don't effect gravity ... therefore we should be able to study matter inside the EM Event Horizon with gravity waves ... or so it's hoped ...

Louisiana to Washington State was just to show LIGO worked (2,000 miles) ... now it's time to go with heliocentric orbits (100,000,000 miles) ... [ka'ching] ... support your local astronomer ...

 

[trevorjohnson83]

Don't hold your breath ... but the LIGO Experiment was wildly successful ... Gravity Waves are real and we can measure them ... a whole new science reading and interpreting these new avenues of information ... here's a great example, Black Holes are artifacts of electromagnetism only, it appears they don't effect gravity ... therefore we should be able to study matter inside the EM Event Horizon with gravity waves ... or so it's hoped ...

Did you miss my telescope gyroscope banter?

 

[ReinyDays]

Did you miss my telescope gyroscope banter?

Yes ... the telescopes I've used just used the Earth as a gyroscope ... close enough for photography ...

 

[MarathonMike]

They say the bright center of a galaxy is a black hole. That sentence seems contradictory. Why would a black hole emit bright radiation like a star? How does the matter that reflects this radiation in the center avoid the black hole's gravity?

Here is an interesting video that explains what you are seeing near a black hole. You obviously can't see the "hole" itself, but it's effects are very visible.

 

[Fort Fun Indiana]

They say the bright center of a galaxy is a black hole. That sentence seems contradictory. Why would a black hole emit bright radiation like a star? How does the matter that reflects this radiation in the center avoid the black hole's gravity?

The material near the black hole is orbiting so quickly that it superheats from friction. So it emits x-rays.

The bright blotches you see at the center of galaxies are clusters of stars that gather near the central black hole.

the "light" you see in the close-up shots is high energy X-ray emission from the material orbiting very close to the black hole, as described above.