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Questions tagged [black-hole]

Questions regarding small points in space where there is infinite density, with an event horizon past which the gravitational forces are so great even light cannot escape.

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Why does the Event Horizon Telescope (EHT) not include telescopes from Africa, Asia or Australia? [migrated]

The Event Horizon Telescope seems to include these radio telescopes currently: Image by European Southern Observatory (ESO)/O. Furtak; CC-BY 4.0-licensed, see the source on Wikipedia Commons and the ...
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What part of the EM spectrum was used in the black hole image? [migrated]

The EHT has published the first image of a black hole. It is the event horizon of the singularity in M87 against its accretion disk. I've been through the reports in the popular press but none ...
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Same philosophy of astronomers of 1st image of black hole as paleontologists on Jurassic World? [migrated]

The historical first image of a black hole is captured from eight different telescopes, where each saw the hole through its own prism. Then, scientists took these data and combined them to make the ...
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2answers
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Is it possible to orbit a black-hole AT the event horizon? [closed]

https://en.wikipedia.org/wiki/Black_hole#Innermost_stable_circular_orbit_(ISCO) ISCO is apparently the current theoretical limit for orbiting black holes (as sourced by wikipedia). Original Question:...
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Is gravity assist provided by black hole as shown in Interstellar possible? [duplicate]

In our space missions, we use gravity assists by planets to change the speed relative to the sun. The speed relative to planets remains the same. We cannot use the sun for gravity assists. In ...
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1answer
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Galactic center. Questions about super massive black hole [closed]

If there is a super massive black hole at the center of the milky way galaxy and it sucks matter and light especially, how does the center of galaxy look bright? If we are slowly getting sucked into ...
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0answers
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How could a local compact star remnant be used for space exploration? [closed]

If a neutron star or black hole was detected, say, only one parsec from here, would it help space exploration? Could it be used as a gravity assisted flyby portal for interstellar space flight? I ...
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1answer
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What kinds of objects could we potentially observe through gravitational waves? [closed]

With the discovery of gravitational waves, I keep hearing that we now have a "totally new way to explore the universe." But as I understand it, gravitational waves are only detectable when they come ...
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1answer
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Time dilation between Earth and a similar planet revolving around a supermassive Black hole [closed]

I was thrilled watching 'Interstellar'. It was only much later that I came to realize certain anomalies in the movie (like the scene in which McConaughey approaches the Gorgantua — his body ...
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What Would Happen if We (Theoretically) Send a Drone With a Camera Inside a Black Hole? [closed]

Currently, the closest known black hole to Earth is between 1600-24000 light years away. Even if we do send a drone travelling at the speed of light, it would reach the black hole long after we are ...
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4answers
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Is there any stable orbit around a black hole?

Is there any stable orbit around a black hole so that the spacecraft will remain in orbit without any disturbance over a long period of time ?
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3answers
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Would there be any benefit to sending a probe to a black hole?

It's perfectly safe to orbit a black hole - as long as you don't cross the event horizon, you're fine. My questions is this: is there anything we could learn by doing so? Since nothing can escape a ...
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Are there any plans to send a probe to orbit a black hole?

Since a black hole only has as much gravity as it did before it collapsed, it's perfectly safe to orbit it. Do any countries have plans to send a probe to orbit a black hole? What is the timeframe?
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3answers
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Could black holes be used for swing-by?

Due to gravity and movement an object can be accelerated (positive/negative) and slingshot into another direction. This has been used various times, but as far as I know with orbital objects like a ...
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Could a black hole be used as portable gravity device? [closed]

I don't use the term artificial gravity because, the gravity from a black hole is real. If you have harnessed and are able to control a black hole would you be able to use it as portable gravity ...