![]() |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
![]()
On Aug 23, 8:11*am, Nomen Nescio wrote:
http://www.orbitalvector.com/Deep%20...rentz%20Microp robes/LORENTZ%20MICROPROBES.htm I saw this yesterday on Disovery Science and hadn't heard of it previously. The goal would be to use charged nanobots which would be accelerated by Jupiter's magnetic field (Lorentz force) to great speed. The charge would then be turned off after which they'd shoot away into space. The guy who invented it said that with current technology we could get up to a couple of percent of lightspeed and up to lightspeed in the future. Maybe NASA should give this a try, just to see if it's workable. I like the idea. According to linked articles on that page, the proposal received a grant from NASA's Institute for Advanced Concepts: Starship on a Chip. Big distance, tiny spacecraft. By Tony Reichhardt Air & Space Magazine, November 01, 2006 http://www.airspacemag.com/space-exp...-Starchip.html Mmmm, Space Chips. Little spacecraft could hitch a ride on Earth's magnetic field to search for alien life. By Gregory Mone Posted 08.06.2007 at 2:00 am http://www.popsci.com/military-aviat...mm-space-chips It might also receive funding through DARPA's recent request for proposals on interstellar flight. I gather the proposal arose in 2006. Then it's possible the impetus for the idea came from this discussion on sci.astro: Newsgroups: sci.astro From: Date: 19 Jan 2006 06:53:39 -0800 Subject: My crazy idea for an interstellar probe with near-present technology http://groups.google.com/group/sci.a...363c965de65193 That it might have been inspired by this discussion from 2006 is also suggested by the fact it proposes using a version of Robert Zubrin's magnetic sail idea for the propulsion, also mentioned in the sci.astro discussion. What's different is that it is much more currently feasible in that it recommends using centimeter scale probes rather than ones at the micro/nano scale and it would use the Earth's or Jupiter's magnetic fields to propel the probes rather than Earth-bound high energy accelerators. Also, in the description of this proposal the many separate probes would not have to link up, since it's possible now to carry real microsensors and microcircuits on the centimeter scale probes. Even for the probes many kilometers apart they could still form an effective radio telescope by being linked by radio signals. A problem though is that far apart they could not act as a single optical telescope since we still can't do optical astronomy with separate scopes that widely separated. So the separate probes could only form separate images from centimeter scale apertures. For this reason It would be a good idea to see how these centimeter- scale probes could be made to link up. That may give us insight into how the micro/nano scale probes could be made to link up. Bob Clark |
#2
|
|||
|
|||
![]()
Robert Clark wrote in
: [...] For this reason It would be a good idea to see how these centimeter- scale probes could be made to link up. That may give us insight into how the micro/nano scale probes could be made to link up. Bob Clark Getting the probe there is half the challenge. Getting it to talk back is the other half. I have a difficult time imagining how a centimeter scale probe could have the power source and physical antenna size required to send anything to Earth. |
#3
|
|||
|
|||
![]() |
#4
|
|||
|
|||
![]()
On Aug 24, 3:41*am, eric gisse wrote:
Robert Clark wrote : [...] *For this reason It would be a good idea to see how these centimeter- scale probes could be made to link up. That may give us insight into how the micro/nano scale probes could be made to link up. * Bob Clark Getting the probe there is half the challenge. Getting it to talk back is the other half. I have a difficult time imagining how a centimeter scale probe could have the power source and physical antenna size required to send anything to Earth. They might store power from solar cells for burst transmissions to the bus that brought them, which then relays to Earth. As for linking them up for optical telescopy, that'd require us to know how to compare phase information from two images. Mark L. Fergerson |
#5
|
|||
|
|||
![]()
On Aug 24, 2:27*am, Robert Clark wrote:
Nomen Nescio wrote: The charge would then be turned off... That's not exactly easy to do. You can't "turn off" a charge... and if it was easy to bleed off then you'll have trouble maintaining it. The guy who invented it said that with current technology we could get up to a couple of percent of lightspeed... Any pointer to calculations? I'd like to know at a minimum the assumptions underlying them. ...and up to lightspeed in the future. Yeah... pedantically, you can't make it "up to lightspeed". More pertinently, throwing something small at high speed *anywhere* is going to be a problem (interstellar erosion is going to be tough for significant-sized objects... it will be far far worse for very small objects (square-cube law bites again). 'Course, you can make them really really cheap and numerous so there's a lot of redundancy in a "cloud"... but you're not likely to do anything up around relativistic speeds. Starship on a Chip. Big distance, tiny spacecraft. By Tony Reichhardt Air & Space Magazine, November 01, 2006 http://www.airspacemag.com/space-exp...-Starchip.html Mmmm, Space Chips. Little spacecraft could hitch a ride on Earth's magnetic field to search for alien life. By Gregory Mone Posted 08.06.2007 at 2:00 am http://www.popsci.com/military-aviat...007-08/mmmm-sp... I'll have to look at those, thanks. -- Brian Davis |
#6
|
|||
|
|||
![]()
On Aug 24, 6:41*am, eric gisse wrote:
I have a difficult time imagining how a centimeter scale probe could have the power source and physical antenna size required to send anything to Earth. Even from interplanetary space... not to mention the much much MUCH harder problem of doing it from interstellar distances. You might be able to power them not with photovoltaics, but beamed power, illuminating the constellation of nanosats when they are near something of interest... but in that case you're re-inventing Starwisp (but with a poorer transmission ability). Personally, Starwisp seems more plausible. -- Brian Davis |
Thread Tools | |
Display Modes | |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Novel Lorentz propulsion | Nomen Nescio | Policy | 13 | August 25th 11 04:23 AM |
Interstellar Propulsion idea using an Asteroid and a few comets! | Henry Spencer | Policy | 17 | October 2nd 04 12:23 AM |
Interstellar Propulsion idea using an Asteroid and a few comets! | PSmith9626 | UK Astronomy | 8 | September 15th 04 04:22 AM |
Interstellar Propulsion idea using an Asteroid and a few comets! | Andrew Nowicki | Policy | 4 | August 16th 04 08:51 PM |
Interstellar Propulsion idea using an Asteroid and a few comets! | Andrew Nowicki | Amateur Astronomy | 1 | August 14th 04 04:09 PM |