Discussion Board

Topic: Kepler Data and FTL

From: Jason Taylor
Location: Baton Rouge, LA
Date: 06/17/2010


Nasa seems to have realeased the Kepler data this week. That fact got me to thinking about how to communicate with whatever we find. And then it dawned on me, we do not have to figure it out. They will have already(assuming an FTL society.) So all we have to figure out is how to receive the data. I'd certainly like to listen in to the alien broadcast of 'Fix your own gravity drive' or 'nano's and you'
Whimsical thoughts!

Re: Kepler Data and FTL

From: Greg Bear
Date: 06/19/2010

Cosmic Public Radio (apt acryonym CPR) has a show called "All Things Considered... no, REALLY, All Things."

Re: Kepler Data and FTL

From: Igor
Date: 07/07/2010

I've always wondered if changes in gravity are instantaneous. If the sun was to disappear (as by magic), would Pluto change course instantly, or would it take several light hours for a gravitational tidal wave to reach it?

If gravitational changes are instantaneous, a device could be designed that creates gravitational pulses (setting off nukes on a moon might do the trick), and another device that detects them, allowing FTL communication.

If manipulating gravity proofs to difficult, it might still be worth the effort to create the listening device to see if something out there is doing it.

Re: Kepler Data and FTL

From: Greg Bear
Date: 07/20/2010

All part of the long-term search for gravitational waves, which according to general relativity, should exist... and should travel at the speed of light. And along with that wave goes the graviton... Anybody want to try a two-slit experiment just outside a wobbling neutron star?

Re: Kepler Data and FTL

From: Alex
Location: st neots
Date: 08/12/2010

I was reading in New Scientist about a guy called Petr Horava at Berkley whos (I think) rejigged the relationship between spacetime and the speed of light, removing the need for C to be the same for all observers at all times.
He thinks maybe in the early hot universe this symetry might have been different.
Apparently this allows our equations to give reasonable results for gravity at quantunm scales and makes them match up with observed vacuum energy level, two big issues with standard relativity.
And it emphatically supports the light speed graviton.
Its all very interesting and seems very elegant to a layman.

I think the fact that there's a speed of light at all interesting. What does it mean?

Re: Kepler Data and FTL

From: Greg Bear
Date: 08/19/2010

The limitation of c means "Slow down and smell the roses"?

Re: Kepler Data and FTL

From: Alex
Location: st neots
Date: 08/20/2010

Definitely, otherwise if you go too fast, youll blink and miss... everything.

Re: Kepler Data and FTL

From: Alex
Location: st neots
Date: 08/22/2010

Yeah! Slow and steady fills the universe.
There obviously are ways you can make things travel faster than light, like if you shine two beams of light parallel and then angle them toward eachother, the crossing point could easily go FTL. As I understand it no information can be carried with any of that kind of trickery though. Shame.

Anyone else like Macroscope? That featured several info broadcasts from aliens, one of which allowed FTL travel by melting people into liquid that could withstand thousands of Gs. That book blew my 15 year old mind!

Re: Kepler Data and FTL

From: Greg Bear
Date: 08/24/2010

My favorite Piers Anthony novel. Big and rich with ideas.

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