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Forgive my ignorance. If it's so relatively close, why wouldn't it be observed optically hiding some known objects? Mostly stars.
Relatively close is still frightfully far away.
why wouldn't it be observed optically hiding some known objects? Mostly stars.
It's angle subtended is still awfully teeny.
Forgive my ignorance. If it's so relatively close, why wouldn't it be observed optically hiding some known objects? Mostly stars.
Sorry, how is this evidence?
We used to have a perfectly adequate Planet 9, until it was declared unworthy of planethood.
Check the size of the Earth's Moon.
...
Earlier quoted context omitted.
Neptune is still fully imbued of planet-hood, regardless if you prefer to call Ceres a planet or dwarf-planet.
Has Ceres ever been classified as a planet ? Inquiring minds want to know.
Earlier quoted context omitted.
Why will this stupid meme not die?
A ton of us grew up reciting Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune PLUTO But, the meme doesn’t die because the deplanetization of Pluto was a weird occurrence that doesn’t usually happen. The biggest association I have with Pluto is that it used to be a planet, so why wouldn’t I joke about that every time I see it mentioned?
Forgive my ignorance. If it's so relatively close, why wouldn't it be observed optically hiding some known objects? Mostly stars.
One of the options is that it's a primordial black hole, which leads to my favourite "actual size" caption on a diagram, page 5: https://arxiv.org/pdf/1909.11090
Forgive my ignorance. If it's so relatively close, why wouldn't it be observed optically hiding some known objects? Mostly stars.
One of the options is that it's a primordial black hole, which leads to my favourite "actual size" caption on a diagram, page 5: https://arxiv.org/pdf/1909.11090