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420chan is Getting Overhauled - Changelog/Bug Report/Request Thread (Updated July 26)

Black hole instead of a planet x?

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- Mon, 17 Oct 2016 18:06:57 EST eY06FJul No.56529
File: 1476742017066.gif -(1621583B / 1.55MB, 277x283) Thumbnail displayed, click image for full size. Black hole instead of a planet x?
Wouldn't it be more likely that a [stationary?] black hole is accounting for the gravitational effects thought to be responsible by planet x?
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Bernard-Ferdinand Lyot - Mon, 17 Oct 2016 18:43:51 EST tQX5ylFX No.56531 Reply
>>56529
I'm no expert but isn't every thing in motion? some how making that connection with time? at least that's how I figure it. space-time
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Edwin Salpeter - Mon, 17 Oct 2016 20:19:01 EST rszf0FN0 No.56533 Reply
No, why would it be more likely? We have observed the ninth planet optically, a black hole produces no light emissions. It would also have totally different gravitational effects on the rest of the solar system.
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Margaret Burbidge - Tue, 18 Oct 2016 19:14:27 EST YHjXylC8 No.56535 Reply
1476832467030.png -(193594B / 189.06KB, 740x697) Thumbnail displayed, click image for full size.
>>56533
>It would also have totally different gravitational effects on the rest of the solar system.
No, a black hole the mass of a planet would have the same gravitational effects as a planetary mass.

Of course, a black hole of a mass of 6×10^25 kg would be ~7 inches across and would turn into a tiny quasar if anything ever collided with it.
If there was a quasar in our solar system, we wouldn't know.
Because we would be dead
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Henrietta Levitt - Wed, 19 Oct 2016 00:26:50 EST rszf0FN0 No.56539 Reply
>>56535
Well there you have it, it can't be a black hole then, because there is so much debris in the solar system something would've collided with it within 4 billion years.
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Otto Struve - Wed, 19 Oct 2016 01:26:46 EST eY06FJul No.56540 Reply
>>56539
The average asteroid is really small. The average meteoroid is even smaller. If nothing has hit the earth in 66 million years(?) then how could something hit a black hole that's 7 inches across.

>something would've collided with it within 4 billion years.
That would be true if you had a mathematical equation for it

I didn't know that we have observed planet x. The last time I read about it was years ago. I just thought this would be a fun thread
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Henrietta Levitt - Wed, 19 Oct 2016 01:39:02 EST rszf0FN0 No.56541 Reply
>>56540
We are literally continually hit with shit, asteroids are constantly burning up in the atmosphere, most too small to even be seen. I guess we can't rule out that it's a black hole until we optically detect it, but it seems extremely unlikely. The black hole would have to have arrived in our system after it was already well formed or it would have consumed the proto-stellar nebula, but the ninth planet has a nice elliptical orbit like all the rest, which an object entering from outside could scarcely naturally enter.

And yes, indeed it has been seriously theorized to exist, but it has not yet been directly observed:
https://www.caltech.edu/news/caltech-researchers-find-evidence-real-ninth-planet-49523
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Henrietta Levitt - Wed, 19 Oct 2016 04:17:39 EST rszf0FN0 No.56542 Reply
1476865059879.jpg -(78469B / 76.63KB, 585x483) Thumbnail displayed, click image for full size.
>>56541
Ehh I forgot it wasn't so elliptical, but the proto-stellar nebula thing holds.
Maybe it's alierns?
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Carl Seyfert - Sun, 23 Oct 2016 17:53:43 EST gmm1Ygns No.56552 Reply
>>56542

It's always aliens, bro.

Like that newly discovered star that has a funky dimming effect. Totally an alien Dyson sphere under construction. I refuse to believe anything else.
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Walter Baade - Mon, 24 Oct 2016 22:49:24 EST M/g1akbS No.56554 Reply
1477363764832.jpg -(9751B / 9.52KB, 350x200) Thumbnail displayed, click image for full size.
>>56540

> >something would've collided with it within 4 billion years.
>That would be true if you had a mathematical equation for it

So I feel compelled to add this. Something would always hit it, due to dust. I mean, check these links out and read up on dust:
http://atropos.as.arizona.edu/aiz/teaching/nats102/mario/solar_system.html
http://stupendous.rit.edu/richmond/answers/dust.html

So like, if there was a black hole out there, with dimensions of 7"....If it lasted for this long [hawking radiation and all that], then it would probably have a faint infrared glow from the accretion disk formed around it. It would have an accretion disk because all that gas its running into has to go somewhere. Its hill sphere is the effective radius of a planet with mass x, not just 7".
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William Lassell - Thu, 03 Nov 2016 16:21:01 EST OXINl/7g No.56617 Reply
>>56529
No, because black holes are rarer in the universe than planets, and a black hole with a small enough mass to cause those effects but without eating the rest of the Kuiper Belt and Oort cloud would be pretty hard to form in the first place. And if it did form, the supernova that caused it would have blasted the rest of the solar system to bits.

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