Three observations over the meteor/alien craft story:
1. If it were a craft (aliens)....the route would have brought it near Earth.....not near Mars and then the sun. So I believe it's just a big chunk of rock.
2. The craft story? I think it only works if it'd been sent to do one single pass through our solar system. Automated vessel....just to collect data, and return.
3. If it does NOT emerge from the back-side of the sun...(November) just 'hiding' there? Then all bets are off, and its some alien craft lingering in a hiding position.
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Newton's Third : every action creates an equal opposite reaction.
Corollary : movement requires thrust.
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My tiny brains help understanding the apparent amount of fuel required for moving between solar systems.
At our current -- admittedly crude -- level of understanding, fuel (or something) is pushed out a rear nozzle to force the front of the vehicle into the preferred movement forward... Newton's Third.
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a)
How can an interstellar vehicle -- or organism in the shape of a vehicle -- collect enough energy to sustain the crew plus adjust vehicle speed and direction.
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b)
What types of interstellar debris could that type of vehicle collect and take aboard to convert into fuel and sustainment for the crew.
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Moving a vehicle using a force such as gravity or magnetism seems slow and unreliable.
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2)
Distances and therefore time between solar systems and re-fuel opportunities suggest either extremely long-lived organisms or a craft designed for multi-generational crews.
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If the latter, based on our experiences with humans, atrophy and degradation of mission seems inevitable.
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