Carl Sagan on black holes and the bending of light
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@Ryalnotch Thanks for your reply. I think I once heard Hawkins in a lecture say that there is a limit to how big a star can be before it inevitably collapses into a black hole (he was probably talking about Schwarzschild's work). I guess a "dark star" would have to be exactly balanced in size between preventing light escaping and collapse.
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@TenTonHorse Well its a possibility but if they exist they must be rare because the conditions have to be just right. I believe the star would be very instable. It might be a possible fase for bigger stars before they die.
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@63Hertzi It is not massless, everything that moves/can move has kinetic energy or if its still "potential energy" so rest mass. Most things can move and be still so they have kinetic energy and a rest mass but light can never slow down so it only has kinetic energy which means they also have mass because E=mc^2 which means that energy and mass are interchangable.
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@AndyBJ Light photons are certainly not atoms, they are particles. One photon does not have any mass at all but a cloud or photons/beam of light have mass because they have energy, kinetic energy and E=mc^2 means energy and mass are interchangable.
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Three words: atheist worm chow
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how come light is being disturbed by ultrastrong gravitational force since it's massless?
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Out of curiosity, could there be a star that is "big" enough to have an escape velocity that prevents light from escaping, but "small" enough to not collapse upon itself? I guess this would be the dark star proposed by Laplace.
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@stride7860 Whilst I commend your scepticism, you are missing out on TheSonicGod's appreciation for one of the best pieces of satire in recent history. Enjoy: youtube.com/watch?v=kkCwFkOZoO
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LOL - "I've been to a couple of parties like that, myself"
Whatwon1 1 month ago 10
this is so fucking interesting--why isn't science taught like this at school? imagine gravity just being 2X as strong, or 5 times as strong, trying to move would be like a marathon...10X--wed all be dead. But then you keep going to 100 times--Then 10,000X and light hasnt even flinched. 1,000,000X and still nothing!--only at BILLIONS of G's is light effected --meanwhile were fucking dead at 10.
pawndominance1 3 months ago 4