A Black Hole with sufficient mass to consume our planet would cause strong and noticeable gravitation disruptions that we would be able to detect even if it's 3 years out.
As far as I know, know such anomalies have been detected.
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You forgot to take into account "by". Fucking idiot.
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That literally changes nothing.
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It changes a lot but you're too much of a dumbass to find it out. Faggot.