Solar Sail but taken the next level.. So instead of normal solar winds, and better than using lasers, your using one step up? Hum,will think on it.. Okay, just...
I've done some more detailed figuring on how the orbital mechanics would work, and there's no need for a "binary trampoline" juggling act. Instead, you can...
We've got comets out to what, almost a light year? And we expel as many comets as are slung into the inner system. And yet not one extrasolar comet has passed...
... You posted a link to an article about a comet that some are presuming is of alien origins, so you're starting with an hypothesis of an extrasolar comet....
What if said asteroids/comets was really giant space ships that looked like asteroids but housed invaders? How would a giant space ship with some sort of...
... Mildly hyperbolic. They're all more or less stopped at infinity. A true extrasolar will come zipping by with 10+ km/s of excess speed. ... The invention...
... Which leads to the question, was this due to increasing dependency on more, and more vulnerable, electronics, or to an increasing understanding of EMP?...
David McMillan
skyefire@...
Nov 20, 2009 1:12 pm
82293
... I do not *know*, but I believe the answer is: All of the above, with the key piece being the move to transistors instead of tubes -- increased...
I think this is the important point. Tubes are highly resistant to EMP. Especially, they are practically impossible to destroy by EMP, whereas transistor...
... We see lots of comets being shed by Sol because they all have to come in close enough to interact with one of the planets to be shed. But once it's been...
... I assume it wasn't *carried* on the tether. Actually, that doesn't sound like a terribly bad idea, as long as the separation tests showed consistent...
David McMillan
skyefire@...
Nov 20, 2009 4:19 pm
82297
... Well, let's do a bit of back-of-the-envelope calculating to see what we would expect to find. Let's say that we would detect a comet if it came within a...
Brian York
polemarkh@...
Nov 20, 2009 4:30 pm
82298
... So only three percent of all comet-bodies are shed by each star throughout its lifetime? -HJC...
... My bad. 30 million out of a trillion is only 0.003% So Sol is a very special case as it has had exactly the right qualities to generation lots and lots of...
... Not at all. What I'm saying is that, at the moment, there's no evidence that, even if other stars on average lost the same fraction of their comets as we...
Brian York
polemarkh@...
Nov 20, 2009 6:28 pm
82301
... I'd be more ready to lean inwards such that it has to have a visible tail, but at that point you've got all of recorded history to work from. ... What's...
... Interestingly, that paper derives an upper limit of 6e-4 solar masses per cubic parsec which, given the density I suggested (1.83e8 comets per cubic...
Brian York
polemarkh@...
Nov 20, 2009 7:22 pm
82303
... I don't specifically know either, but I agree the logical answer is probably "both." -- Erik Max Francis && max@... && http://www.alcyone.com/max/ ...
... Not necessarily. Depends entirely on the original orbit of that comet. A comet in a similar orbit around the Galaxy to the Sun's would be observed to have...
I now think that the ideal candidates for interstellar colonization are stars with close orbiting companions--either a warm Jupiter or close orbiting star....
... Actually, I think this is something Henry got right in this whole exercise. Even the nearest stars, which are (with the exception of a few halo stars)...
... Yes and no relativistic packages from the home system are needed for the harvesting. Assuming magsail drive you can launch the "impactors" at ZERO delta-v ...
... Sure, the velocities _could_ be high, and usually would be. But my point was they don't _have_ to be. Lack of hyperbolic comets with very high hyperbolic...
remember Kahoutec, the big head with no tail? how many gas poor comets of interstellar origin might we have missed over the last 400 years? ... [Non-text...
... Though the fact that the "comet" had a huge tail while it was plugging around through interstellar space was not exactly good cover ... -- Erik Max Francis...
Wild what I missed in time.. Not been reading as much as I used to and it shows? A peaceful race would build a way to be protected, hidden and secret, as they...
Really alien life, any ideas? One example was life that evolved on Europe, a moon of Jupiter (?) where the fluid ocean is miles below an ice sheet, and what...
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