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If it were earth mass it would be ~grapefruit size. This estimate puts object nine at 9 earth mass so maybe vollyball size or melon size? https://www.astronomy.com/science/is-planet-nine-a-black-hol...
Grapefruit versus volleyball? If you make a black hole 9x as heavy, it gets 9x the radius. 700x the volume.
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Grapefruit versus volleyball? If you make a black hole 9x as heavy, it gets 9x the radius. 700x the volume.
Aren't these all the same things by astronomical levels of precision?
love how nerdy this whole thread gets - so much hot debate for basically a frozen rock way out there. you think we're ever gonna agree on what counts as a planet or is it always just moving goalposts?
By comparison the entire Kuiper belt – including Pluto – is estimated to have a total mass of about 10% of Earth's mass.
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700 AU is way past heliopause, firmly in the interstellar space. Same, 15 times farther than Pluto is definitely away from the Solar system "proper". It's about 100 light-hours away from Sun. I wonder how could this object be counted as a "planet" belonging to the Solar system, even if it were the size of Jupiter. But it's an object "estimated to be 2 to 4 times the radius, and about ten times the mass of the Earth".…
As long it is orbiting the sun, i.e bound by the solar gravitational field then it is in the solar system? Also depending how elliptical the orbit, is the perigee might be much closer than 700AU, while still being further than Pluto's orbit. For all we know 700 AU is the apogee and say the perigee is 70 AU (1.4x Pluto's apogee ).
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For us Elite Dangerous players to get a sense of scale, that’s approximately 329,472,000 light seconds. Hutton Orbital is located approximately 6,784,404 light seconds, or 0.22 light years, so this will be 50 hours of non boosted SC.
> that’s approximately 329,472,000 light seconds I think you have an extra factor of 1000 somewhere.
Which means Hutton is a lot further actually.
I think “15 times further from the Sun than Pluto” is more meaningful for most readers than “700 times further from the Sun than Earth.” If it exists, it’s way way way out there.
I find one theory regarding Planet 9 especially interesting, and that is that it could be a primordial black hole with a Schwarzschild radius on the order of just a few centimeters. So basically, just a golf ball-sized black hole. This would explain why we can see the gravitational effects on the other objects as described in many papers, and it would also explain at the same time why we have no direct observation of…
This cannot be evidence of Planet 9 (the Batygin and Brown hypothesis)—it's outright incompatible with it. https://bsky.app/profile/plutokiller.com/post/3lnqm2ymbd22r If those two spots are the same object, that object is on a high-inclination orbit; but the pattern the Planet 9 hypothesis explains is only compatible with a low-inclination object.