Devin-M's latest activity
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.Sorry it’s taken me so long. I’m planning to run the numbers with a 5 solar mass black hole and a 1 solar mass black hole - in a...
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DDevin-M reacted to collinsmark's post in the thread Our Beautiful Universe - Photos and Videos with
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Flaming Star Nebula (IC 405), celebrated from my back patio, January-March, 2025. IC 405 is an emission and reflection nebula in the... -
DDevin-M replied to the thread B Oberth Effect Near Sag A*.kinetic energy per Kg?
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.So in the formula in post 5, is y the lorentz factor, r the distance in meters from the center? Is M the mass of the black hole in kg...
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.I will try to work this out later when I have a chance, but on the basis of the photon sphere being smaller on small black hole, and...
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.Would you get the same boost at the edge of the photon sphere with any black hole or is this specific to Sag A*?
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.And this: “ Oberth effect also can be used to understand the behavior of multi-stage rockets: the upper stage can generate much more...
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.Hmm, I thought some of the fuel getting more kinetic energy before being used might be helpful, since the wikipedia article for oberth...
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.I assume this is treating the burn as an instantaneous impulse. Would extending the burn over time result in higher speed? In this case...
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DDevin-M replied to the thread B Oberth Effect Near Sag A*.Seems 0.4c final velocity craft with oberth effect would indeed arrive out to the distance of Andromeda Galaxy before the 0.33c direct...