101nut Posted September 11, 2016 Share Posted September 11, 2016 This is your S@N alarm call - 10pm tonight ... AndyG Link to comment Share on other sites More sharing options...
Pete Presland Posted September 11, 2016 Share Posted September 11, 2016 Thanks for the heads up! Link to comment Share on other sites More sharing options...
SilverAstro Posted September 11, 2016 Share Posted September 11, 2016 How many Gigawatt laser ? ! on the ground ? !!! wouldnt want to wander through that in yer hot air balloon ! Link to comment Share on other sites More sharing options...
101nut Posted September 11, 2016 Author Share Posted September 11, 2016 Just now, SilverAstro said: How many Gigawatt laser ? ! on the ground ? !!! wouldnt want to wander through that in yer hot air balloon ! Be a massive power cut while it fired too. AndyG Link to comment Share on other sites More sharing options...
SilverAstro Posted September 11, 2016 Share Posted September 11, 2016 What frequency ? Atmospheric absorption ? surely it would have to be in orbit with a massive solar farm ? An atmosphere to distribute temperature round this tidally locked planet, heck of a wind ! Put the sirocco to shame Link to comment Share on other sites More sharing options...
SilverAstro Posted September 11, 2016 Share Posted September 11, 2016 Ah, maybe I missed a bit, continuous or pulsed laser ? Link to comment Share on other sites More sharing options...
DaveS Posted September 12, 2016 Share Posted September 12, 2016 Semi-pulsed I think, 10 min to reach 20% lightspeed. Need a wavelength with low atmospheric absorbtion, and where laser generation is efficient. And put the instalation somewhere high and dry. Link to comment Share on other sites More sharing options...
Pippy Posted September 13, 2016 Share Posted September 13, 2016 Seems so long since the previous episode. Bit by bit eh BBC Link to comment Share on other sites More sharing options...
DaveS Posted September 14, 2016 Share Posted September 14, 2016 TBH, I think their schedule was scuppered by the wretched Olympics . BBC4 was totally saturated, end even BBC2 was infected. Link to comment Share on other sites More sharing options...
martinh40 Posted September 14, 2016 Share Posted September 14, 2016 Getting up to 20% light speed is one thing, but what about slowing down? Link to comment Share on other sites More sharing options...
Pippy Posted September 14, 2016 Share Posted September 14, 2016 With a lump of matter like that traveling at that kind of speed I wonder what kind of crater it would cause on a planet/moon (with and without an atmosphere). I would imagine most any and most all bodies sort of Mars sized and up would have an atmosphere of some kind ? .. too much gravity not too really I'd have thought. Link to comment Share on other sites More sharing options...
astro mick Posted September 15, 2016 Share Posted September 15, 2016 On 14/09/2016 at 08:53, DaveS said: TBH, I think their schedule was scuppered by the wretched Olympics . BBC4 was totally saturated, end even BBC2 was infected. I think to be fair,BBC1 had its fair share of coverage with the Olympics. What these people achieve with such severe disabilities amazes me,and I for one support and watch them wholeheatedly. I can catch up on a programme later. Mick. Link to comment Share on other sites More sharing options...
DaveS Posted September 15, 2016 Share Posted September 15, 2016 Mick, it was the Olympics I was talking about, saturation coverage on BBC1, (Apart from Eastenders of course , can't have that interrupted, can we ?), BBC4 (Where S @ N airs first) and even infecting BBC2. The Paralympics are on Ch.4. Link to comment Share on other sites More sharing options...
Gina Posted September 15, 2016 Share Posted September 15, 2016 I too very much admire the competitors in the Paralympics - wonderful Don't generally watch sport but I do like to watch and admire the Paralympics Link to comment Share on other sites More sharing options...
Pippy Posted September 15, 2016 Share Posted September 15, 2016 How do we go from the sky at night to the olympics in so few postings ? Link to comment Share on other sites More sharing options...
Scott Posted September 15, 2016 Share Posted September 15, 2016 1 hour ago, Pippy said: How do we go from the sky at night to the olympics in so few postings ? I believe it was you who mentioned it has been a while since you saw s&n and other members obliged by explaining why Link to comment Share on other sites More sharing options...
Gina Posted September 15, 2016 Share Posted September 15, 2016 I could further shift the focus to sailing or to be more precise, dinghy racing But I won't Link to comment Share on other sites More sharing options...
Pippy Posted September 15, 2016 Share Posted September 15, 2016 46 minutes ago, Scott said: I believe it was you who mentioned it has been a while since you saw s&n and other members obliged by explaining why You might be right ! but then, I myself don't believe the two are connected in any way shape or form. I believe the olympics may be an excuse, but not the reason. Link to comment Share on other sites More sharing options...
Stu Posted September 15, 2016 Share Posted September 15, 2016 Just now, Gina said: I could further shift the focus to sailing or to be more precise, dinghy racing But I won't Best to try another tack Gina Link to comment Share on other sites More sharing options...
astro mick Posted September 15, 2016 Share Posted September 15, 2016 5 hours ago, DaveS said: Mick, it was the Olympics I was talking about, saturation coverage on BBC1, (Apart from Eastenders of course , can't have that interrupted, can we ?), BBC4 (Where S @ N airs first) and even infecting BBC2. The Paralympics are on Ch.4. Sorry Dave,my humble apologies,you were quite right. Note to self(Read thread more carefully). Mick. Link to comment Share on other sites More sharing options...
astro mick Posted September 15, 2016 Share Posted September 15, 2016 4 hours ago, Pippy said: How do we go from the sky at night to the olympics in so few postings ? Simples. Link to comment Share on other sites More sharing options...
DaveS Posted September 15, 2016 Share Posted September 15, 2016 1 hour ago, astro mick said: Sorry Dave,my humble apologies,you were quite right. Note to self(Read thread more carefully). Mick. That's OK Mick, happens to us all occasionaly! Link to comment Share on other sites More sharing options...
MarkMayf Posted September 15, 2016 Share Posted September 15, 2016 It would be a well made structure to cope with that acceleration. Approx 10g for 10 ten minutes (if my maths are right - doubtful), and as said above, how do you slow down enough to do anything useful when you get there. Link to comment Share on other sites More sharing options...
Alien 13 Posted September 15, 2016 Share Posted September 15, 2016 8 minutes ago, MarkMayf said: It would be a well made structure to cope with that acceleration. Approx 10g for 10 ten minutes (if my maths are right - doubtful), and as said above, how do you slow down enough to do anything useful when you get there. 10 g would be fine for electronics you can fit them inside a shell fired from a canon, 20000 g is probably survivable. Alan Link to comment Share on other sites More sharing options...
saac Posted September 15, 2016 Share Posted September 15, 2016 I don't think they would need to nor intend to slow down - they would use on board cameras and other em senors to sense and report back local conditions (much in the way Voyager is presently doing). I really don't think that there can be any serious attempt to "steer" the craft especially into any orbit. Of course the thing is so far fetched that I may well be completely wrong - won't be the first time Jim Link to comment Share on other sites More sharing options...
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