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The bounce happens when the last bit of space dust gets sucked into the critically infinitesimal black hole.
Imagine that we have concentrated so much stuff into such a small space that all the quantum numbers are occupied. Problem is that the mass still has a negative gravitational potential, so it will slurp up any passing atom or galaxy, but there are no available quantum states within the event horizon, so it all has to disperse and start again. I haven't thought through the timescale of the event yet, but wouldn't it be fun if Dark Matter turned out to be a dust of tiny black holes sucking the universe inwards?
I am surprised that no one has responded to my point as to how disastrous you would be to research into Martian live forms the residue from beer and curry would certainly stymie such research.
Not coming back would be a good idea pathogens that have evolved under harsh Martian conditions would have a field day on our benign planet
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Plenty of astronauts have survived one rocket takeoff and I have survived (and indeed enjoyed) hundreds of takeoffs and landings in various vehicles. No problem there. As for living on frozen curry and stale beer, I thoroughly enjoyed student life in a previous century: interesting work, and plenty of sex and music, compensated for a narrow but wholly nutritious diet, and I don't see why work and pleasure should be any different now. Pasteurised IPA and canned American piss-and-wind may lack character but they don't spoil like cask Abbott.
Well, you wouldn't survive the takeoff for one thing, and if you want to live on frozen curry and stale beer that's your choice.QuoteThere is no point at all in a manned mission to Mars. The only reason we got to the moon was because of the cold war, and the cost in lives and $$ was not worth it. The only place we'll ever have to live on is this little planet so we'd better take care of it.There is no "point" in soccer or ballet, but people do it and pay handsomely to watch it because it is challenging and entertaining. I have no intention of colonising Mars, any more than Benidorm, Everest, the Marianas Trench, or wherever else people go out of interest. You'd have a hard job convincing any astronaut that it wasn't worth the risk, and given the investment interest in private space flight and Premier League soccer, I don't think there would be much problem raising $$$ for my TV spectacular.
A one-way manned mission would actually be a lot cheaper than a robotic one since the landing craft will be autonomous and driven in real time by a human pilot.
There's plenty of solar energy there, just of a rather lower surface density than on earth but not mitigated by clouds or water vapor.
The cost of manned planetary exploration arises from the supposed requirement for a return flight, which demands the uplift of an entire return rocket with a life support system and re-entry vehicle.
At the age of 72 I see no point in coming back to die on this planet, but you can resupply me with as much curry and beer as necessary until I peg out, and I'll give you the best TV science show ever!
90% of the world's population have no access to any art, literature, culture, or science that you would recognise. 10% don't even have clean water.
When I visit the USA I am always surprised what a low population density is has compared to India or China, I must write to Trump or Clinton and suggest they do something about it.