Questions tagged [9th-planet]
Questions relating to the discovery of a new ninth planet (not Pluto) hypothesized in the Solar System.
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At what distance does the galactic tide significantly affect the orbit of a heliocentric object?
The title essentially explains the question. I was wondering if the galactic tide could play a role in raising perihelia of extreme trans-Neptunian objects (i.e. Sedna) versus the effect of a ...
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Question: Planet 9 a Black Hole [duplicate]
I had a shower thought.
"Is it possible that the mysterious 9th or 10th planet is in fact a small Black Hole"?
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If the hypothetical planet had a perihelion around 60 AU, would some consider it being responsible for the Kuiper cliff?
If Planet X had a perihelion around 60 AU and an aphelion in the vicinity of Sedna's aphelion (940 AU), would it be considered to be responsible for both the high eccentricities of TNO's orbits and ...
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What about the U planet?
In 2014 and 15, an object called U has been detected by the ALMA in Chile, considered likely to be a super-Earth at 300 AU, among other options. Is it located where the hypothetical super-Earth ...
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If Planet Nine indeed exists, how large a impact event there should be to be seen from Earth?
Recently I've found this news article, A meteorite crashed into the Moon during total lunar eclipse in January, about a collision into the moon that happened while a lunar eclipse was under way. ...
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Why does Wikipedia state that the Solar System has one unconfirmed planet?
I was looking at exoplanets on Wikipedia, and found this surprising information:
The table states that the Sun has 8 planets (obviously) and one unconfirmed planet. Why is this here? I think it's ...
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Based on discoveries of new TNOs since 2016, is planet Nine still necessary to explain the TNO's orbits?
It is almost five years since the announcement of the likelyhood of another planet that is responsible for clustering eTNO's orbits, very close perihelia of detached dwarf planets to the Sun, and high ...
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Is there or will there be any search after a primordial black hole 500 au from the Sun?
Since 2019 it is proposed that the hypothetical Planet IX may in fact be a primordial black hole. Black holes are being looked after differently than planets. You can look for a gravitational lens or ...
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Can the paper narrowing Solar System's barycentre to within 100m help find Planet Nine?
I've just read this recent news article, Astronomers Have Located The Centre of The Solar System to Within 100 Metres, reporting on a paper[1] that claims narrowing the Solar System barycentre to ...
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What are the 4 candidates for Planet Nine reported in 2017?
From Wikipedia Planet Nine#Citizen science:
In April 2017, using data from the SkyMapper telescope at Siding Spring Observatory, citizen scientists on the Zooniverse platform reported four ...
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Is there any legitimacy to this report of planet nine being discovered by an amateur?
Saw this article on someone from Hampshire UK reporting a possible discovery of Planet Nine. I thought that it would be too dim for anything but the most powerful telescopes to see. Is there any ...
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If thousands of exoplanets have been discovered, why haven't we discovered planet 9 yet? [duplicate]
According to NASA, we've discovered 3,453 exoplanets so far [1]. With some of the farthest being at 13,000 light years away [2]. This would suggest today scientists have a really advanced capability ...
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How can we map masses orbiting the outer Solar System by determining the orbits of planets and smaller objects?
Neptune was discovered 170 years ago with the help of observations of Uranus' orbit. A great demonstration of the scientific principle for its time. Recently, Earth and cis-Lunar based radio ...
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How does 2015 RR245 compare to the other KBOs predicting "Planet 9"?
2015 RR245 was recently announced, in a highly eccentric orbit in the KBO. From what I understand, the so called "Planet 9" was predicted because these objects tended to be pointed in a particular ...
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Is Planet Nine observable in principle?
Is so-called Planet Nine (given it exists) observable in principle? By "observable in principle", I mean "if we knew exactly where to look, would we be able (from a technological standpoint) to get an ...
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