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[Space.com] Stephen Hawking helps launch "Starshot"- to explore Alpha Centauri - Page 4

post #31 of 48
Quote:
Originally Posted by PostalTwinkie View Post

Can't argue that!
lachen.giflachen.giflachen.gif


Quote:
Originally Posted by Cyph3r View Post

Lol what... Even in the asteroid belt in our solar system, the average distance between asteroids is 600,000 miles. Outside of our solar systems main asteroid belt the density of asteroids is pretty much negligible. I don't think you really understand how empty space is.
Comments like these are why after 16 1/2 years of travel it will be hit by an asteroid.


Quote:
Originally Posted by CyberWolf575 View Post

"We will never have devices that make us able to communicate with each other across the world with a single dial of a number!"
"What do you mean to say we can have horsless carriages?"
I could go on.
Source.

Quote:
Originally Posted by xundeadgenesisx View Post

Quick, name something that cant be deemed a waste of money!
Oh right you cant. /s
+1
Edited by jdstock76 - 8/25/16 at 2:18pm
post #32 of 48
This is very cool. One question though, how to they plan on slowing it down once it gets there? From what little I know about this kinda stuff building up and maintaining that high of a velocity is only half the problem. Unless they plan on just sending it through that solar system and not going into some type of orbit, it would have slow down from 0.2c wouldn't it?
post #33 of 48
Quote:
Originally Posted by aludka View Post

This is very cool. One question though, how to they plan on slowing it down once it gets there?

They don't.

It would be a fly-by, sending back information/telemetry until it went out of range or otherwise lost contact. No provision to place it in orbit of anything or to slow it down at all.
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post #34 of 48
Quote:
Originally Posted by jdstock76 View Post

lachen.giflachen.giflachen.gif

Comments like these are why after 16 1/2 years of travel it will be hit by an asteroid.
Source.
+1

Well strictly speaking it would not need to be an "asteroid". Even an grain of sand would destroy it if there was enough difference in relative velocity. Probably the most likely place for that to happen (and still unlikely) would be before it reaches beyond earths own "trash belt". There is an fair amount of that stuff up there and satellites and space crafts do occasionally get hit.
    
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post #35 of 48
Well i hope they get a good data plan, Bell mobility would charge me $46424679754789975458875.56 in over usage charges plus another $356875357853.56 in over billing cause they always screw the bill up
post #36 of 48
Quote:
Originally Posted by ccRicers View Post

And traveling at 0.2c is no joke.
That's 60,000 km per second. What?? eek.gif
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post #37 of 48
Quote:
Originally Posted by Xuvial View Post

That's 60,000 km per second. What?? eek.gif

And it'll still take over 20 years to get there. It's awesome indeed but we need even more smile.gif
Quote:
Originally Posted by Mhill2029 View Post

You sound like me at a dinner party, never goes well for my social interactions biggrin.gif

Which is why i don't socialize with many people nor do i have any desire to. Small talk is mind numbingly boring and im completely content limiting myself to those who can converse on my level without dropping my own level to be socially accepted.

In my opinion us nerds need to step away from what's considered socially acceptable and set a new precedent which has the average striving to reach our level of conversation instead of the way it is now.

But i digress...can't wait to see what is found in a couple decades biggrin.gif
Edited by Bluemustang - 8/25/16 at 10:06pm
    
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post #38 of 48
I dont know about everyone else, but im sick of these click bait "look what planet we discovered. Earth like, much terraform possible" articles.

Edit: Wrong space thread.
post #39 of 48
Quote:
Originally Posted by Bit_reaper View Post

Well strictly speaking it would not need to be an "asteroid". Even an grain of sand would destroy it if there was enough difference in relative velocity. Probably the most likely place for that to happen (and still unlikely) would be before it reaches beyond earths own "trash belt". There is an fair amount of that stuff up there and satellites and space crafts do occasionally get hit.

Not even a grain of sand is required to disable it, a spec of dust will do the job at 60,000km/hr - hell, try to avoid the heavier atoms: http://arstechnica.com/science/2016/08/could-breakthrough-starshots-ships-survive-the-trip/

Even with a minimal cross section and some nose armor, maybe send a squadron. Even if it can survive a dust particle strike, the change in momentum will alter the course.

Would so suck to travel 20 years and the first selfie it sends back from Alpha Centauri is still 15 years away from the Alpha Centauri we wanted. Ain't nobody got time for that. tongue.gif
post #40 of 48
Quote:
Originally Posted by MicroCat View Post

maybe send a squadron.

The current plans call for ~1,000. That way, even with a ~99.9% per unit failure rate, the mission still succeeds.

These numbers are reasonable, because the overwhelming cost of the project, beyond R&D, would be the stationary (and reusable) lasers that push the craft.
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