Actually one of my favorite end of the world scenarios is a rogue giant planet getting pulled into our solar system and changing the earth's orbit. The other thing that interested me is that with various large objects between the systems, a Star Trek like warp speed flight would sound more like a big splat after a few minutes.
>> “Actually one of my favorite end of the world scenarios is a rogue giant planet getting pulled into our solar system and changing the earth’s orbit” <<
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Actually its for real, but its a star, not a planet, and its name is Wormwood. Read Revelation. Its due in a few years.