DA Baracus Posted July 13, 2016 Share Posted July 13, 2016 Assuming time travel was something humans were capable of, it would surely be useless. You could travel in time, but where you travel to would that point in the past. As the Earth and indeed the universe is always moving, you'd be travelling to somewhere unknown. Say you time traveled 100 years; you could end up in empty space as at that point in time the Earth would not be in the same place. To be able to travel back in time to a location, you'd need to able to be able to travel in spacetime. This would surely mean that you'd somehow have to plot at least the known galaxy, and calculate the relative speed of the movement of spacetime, and assume that it is constant. Of course it could be the case that time and space can be plotted in a linear fashion along a line and all you have to figure out is how to travel back and forth along that line. If the energy of the universe is at a constant, i.e. it cannot be created or destroyed but rather altered, then perhaps the passage of space and time follows a set course until eventually the universe exhausts itself and falls back in to a singularity before combustion in to the next big bang? Perhaps it's an infinite loop whereby everything moves at the same time and speed throughout spacetime, forever repeating? Or perhaps the fundamental randomness of the big bang can create an infinite number of possibilities, meaning spacetime can massively differ? Or am I talking pish? 0 Quote Link to comment Share on other sites More sharing options...
KnightswoodBear Posted July 13, 2016 Share Posted July 13, 2016 7 minutes ago, DA Baracus said: As the Earth and indeed the universe is always moving, In all of the directions it can whizz As fast as it can go, the speed of light, you know Twelve million miles a minute and that's the fastest speed there is 0 Quote Link to comment Share on other sites More sharing options...
The Moonster Posted July 13, 2016 Share Posted July 13, 2016 53 minutes ago, DA Baracus said: Assuming time travel was something humans were capable of, it would surely be useless. You could travel in time, but where you travel to would that point in the past. As the Earth and indeed the universe is always moving, you'd be travelling to somewhere unknown. Say you time traveled 100 years; you could end up in empty space as at that point in time the Earth would not be in the same place. To be able to travel back in time to a location, you'd need to able to be able to travel in spacetime. This would surely mean that you'd somehow have to plot at least the known galaxy, and calculate the relative speed of the movement of spacetime, and assume that it is constant. Of course it could be the case that time and space can be plotted in a linear fashion along a line and all you have to figure out is how to travel back and forth along that line. If the energy of the universe is at a constant, i.e. it cannot be created or destroyed but rather altered, then perhaps the passage of space and time follows a set course until eventually the universe exhausts itself and falls back in to a singularity before combustion in to the next big bang? Perhaps it's an infinite loop whereby everything moves at the same time and speed throughout spacetime, forever repeating? Or perhaps the fundamental randomness of the big bang can create an infinite number of possibilities, meaning spacetime can massively differ? Or am I talking pish? 0 Quote Link to comment Share on other sites More sharing options...
Dee Man Posted July 14, 2016 Share Posted July 14, 2016 14 hours ago, KnightswoodBear said: In all of the directions it can whizz As fast as it can go, the speed of light, you know Twelve million miles a minute and that's the fastest speed there is Whoever wrote that is talking shite.13 million miles a minute is faster than that. 0 Quote Link to comment Share on other sites More sharing options...
Zen Archer (Raconteur) Posted July 16, 2016 Share Posted July 16, 2016 On 14/07/2016 at 06:37, Dee Man said: Whoever wrote that is talking shite.13 million miles a minute is faster than that. I think you're being pedantic. Spoiler 0 Quote Link to comment Share on other sites More sharing options...
NorthernLights Posted August 17, 2016 Share Posted August 17, 2016 Scotland from space... Taken by Jeff Williams aboard the ISS yesterday. 0 Quote Link to comment Share on other sites More sharing options...
banana Posted August 22, 2016 Share Posted August 22, 2016 Scale of a supermassive black hole... http://i.imgur.com/DUzDo3k.gifv 0 Quote Link to comment Share on other sites More sharing options...
tintax Posted August 25, 2016 Share Posted August 25, 2016 Nearest potentially habitable world beyond our own solar system found - http://www.bbc.co.uk/news/science-environment-37167390 Always fascinates me when they announce discoveries like this one. How many more are out there? If some of them are habitable is there an intelligent life form on them and if so are they finding planets like are own? Quite the thought 0 Quote Link to comment Share on other sites More sharing options...
Tommy Nooka Posted August 25, 2016 Share Posted August 25, 2016 I'm not so keen on these type of announcements, if you actually look beyond the 'help fund us' type statement, they know absolutely nothing about this planet other than it probably exists and it 'should' be in the sweet spot for liquid water. Other than that yes, definitely a potential source of life. -1 Quote Link to comment Share on other sites More sharing options...
tintax Posted August 25, 2016 Share Posted August 25, 2016 (edited) 55 minutes ago, Tommy Nooka said: I'm not so keen on these type of announcements, if you actually look beyond the 'help fund us' type statement, they know absolutely nothing about this planet other than it probably exists and it 'should' be in the sweet spot for liquid water. Other than that yes, definitely a potential source of life. Well it definitely does exist. The obvious downside to its discovery like every other planet found out with our own solar system is the distance it is away from us. Making it very difficult to study with current technology, it will take years, possibly even decades to find out more about it. Its discovery alone though is cause enough to celebrate. Edited August 25, 2016 by tintax 0 Quote Link to comment Share on other sites More sharing options...
Bully Wee Villa Posted August 25, 2016 Share Posted August 25, 2016 I think I read some Russian bloke was gonna send a probe to research it, travelling at one-fifth the speed of light. It will take twenty years to get there and the info will take another four years to get back to us. If they do this, and the probe disappears off the radar a few miles before it reaches its target it's proof that aliens have destroyed it, IMO. 0 Quote Link to comment Share on other sites More sharing options...
Bully Wee Villa Posted August 25, 2016 Share Posted August 25, 2016 I remember where I read it now... in the link provided on this page. D'oh! 0 Quote Link to comment Share on other sites More sharing options...
banana Posted August 30, 2016 Share Posted August 30, 2016 SETI finds mysterious signal. http://www.msn.com/en-us/news/us/not-a-drill-seti-is-investigating-a-possible-extraterrestrial-signal-from-deep-space/ar-AAid9oY 0 Quote Link to comment Share on other sites More sharing options...
Bully Wee Villa Posted August 30, 2016 Share Posted August 30, 2016 Exciting stuff. What would it take to prove that a signal came from alien life? 0 Quote Link to comment Share on other sites More sharing options...
Tommy Nooka Posted August 30, 2016 Share Posted August 30, 2016 48 minutes ago, Bully Di Villa said: Exciting stuff. What would it take to prove that a signal came from alien life? If it says "I come in peace" ? The older I've gotten the more I've leant towards the side of this debate where it's probably not a good idea to go contacting sentient aliens as they'll highly likely to be quite apex predator-y, it's how evolution works. 0 Quote Link to comment Share on other sites More sharing options...
Bully Wee Villa Posted August 30, 2016 Share Posted August 30, 2016 If it says "I come in peace" ? That's all well and good but they'll probably say it in some mad language that nobody understands... like Welsh. 0 Quote Link to comment Share on other sites More sharing options...
banana Posted August 30, 2016 Share Posted August 30, 2016 Just notice the headline of the link I posted - of course it's fucking extraterrestrial if it's not from here. 12 minutes ago, Tommy Nooka said: The older I've gotten the more I've leant towards the side of this debate where it's probably not a good idea to go contacting sentient aliens as they'll highly likely to be quite apex predator-y, it's how evolution works. Yeah, tend to agree. What advantage would a significantly more advanced species have in not enslaving us / taking our shit? I suppose another normal course of action would be to ignore us as we pose no threat. -1 Quote Link to comment Share on other sites More sharing options...
gkneil Posted August 30, 2016 Share Posted August 30, 2016 I look forward to the internationally-recognised statement of 'Pics or GTFO' aimed at SETI when setting out the required criteria on proving anything 0 Quote Link to comment Share on other sites More sharing options...
banana Posted September 1, 2016 Share Posted September 1, 2016 Well, turns out it wasn't an extraterrestrial signal at all. http://arstechnica.com/science/2016/08/turns-out-the-signal-astronomers-saw-was-strong-because-it-came-from-earth/ 0 Quote Link to comment Share on other sites More sharing options...
Newbornbairn Posted September 1, 2016 Share Posted September 1, 2016 See when they find these planets hunners o miles away, how do they get an artist over to paint it so quick? 0 Quote Link to comment Share on other sites More sharing options...
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