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September 26th, 2020 | #21 |
fluxmaster
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The acceleration due to gravity on earth is about 10 meters per second per second. Traveling away from earth at that rate of acceleration, the passengers could experience earth-like artificial gravity while attaining a speed of 30,000 kilometers per second in just over a month.
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September 26th, 2020 | #22 |
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[QUOTE=Stewart Meadows;2314459]Vincent Price was a jew? Do you have a source for that claim?
Not offhand, I do recall him receiving an award from Abraham Foxman's ADL some 30+ years ago for being a 'Great Jew'. In addition to being an ardent Marxist and an outspoken admirer of Lenin and Stalin, he was also a known bisexual. His third wife and daughter both later identified as Lesbians. BTW, do you know the definition of bisexual? Sometimes you feel like a nut, sometimes you don't. |
September 27th, 2020 | #23 | |
RaHoWarrior-SKINHEAD
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There are many things wrong but the most pertinent for this discussion are that you have omitted any calculation of acceleration. Although, for some reason, you cite the nominal acceleration due to gravity but even that is not used. And at any rate your acceleration would not be due to gravity but rather to whatever is going to get you off the planet (e.g., a rocket). Acceleration is not a constant speed such as you are calculating here, constant speed is by definition not acceleration. Also, you are using 'G' as if it is a unit of speed, distance, time, or something I'm not sure which. But the g-force is not arbitrary, it must be determined from your acceleration and there will be a time aspect (i.e., how long a particular g-force was experienced) since it is a product of acceleration which again is not constant. You will need the equation I gave you earlier and of course the force needed to accelerate a particular mass is simply F=ma. I would do the math for you if I could imagine what you are proposing. Though I suspect now that you might be considering the problem in an over simplified manner.
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September 27th, 2020 | #24 | ||||||||||
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This is all very simple. It's not rocket science. Well, actually, it is rocket science, but very basic, high-school rocket science. There's nothing complicated about it at all.
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All these ideas…are chained to the existence of men, to who[m]…they owe their existence. Precisely in this case the preservation of these definite races and men is the precondition for the existence of these ideas. --Adolf Hitler Last edited by Nikola Bijeliti; September 27th, 2020 at 10:43 PM. Reason: Forgot that little ² doohickey near the end. |
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September 28th, 2020 | #25 |
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The first thing would be to gain the ability to get to the speeds we are talking about. But I wonder what kind of a ship could travel at such speeds and protect itself from radiation and space debris along the way, not like you can pit stop that sucker out there. What kind of shape/size/ship and protection could it have if your sending something that fast through space? A single chunk of floating rock will mess your day up big time. Will ships be more triangular like the bow of a ship with some sort of plate or shielding? If thats the case it will have to limit or work around what kind of cargo and how many humans it could hold.
https://en.wikipedia.org/wiki/The_Millennial_Project The book does cover space travel, has anyone here read it? There are also some cool looking sci fi films coming out, the new Dune movie looks like it can be entertaining if you can try to get over the fact some blacks are now on aracus. Raised by Wolves a Ridley Scott production looks good as well. Foundation finally being made into a film based off the old isaac asimov book series. |
September 28th, 2020 | #26 | |
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https://en.wikipedia.org/wiki/Project_Daedalus Another design study for a manned interstellar ship is the Enzmann starship: https://en.wikipedia.org/wiki/Enzmann_starship
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September 29th, 2020 | #27 | ||
RaHoWarrior-SKINHEAD
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I also mistakenly thought that if you solved this equation and saw, by your own work, that over the 3,000,000 seconds (34.72222 days) you had not accelerated 1f/s closer to 30,000km/s you would realise that it is necessary to factor in the acceleration for there to be any in the result, particularly when advancing a theory that entirely depends on it. On the bright side, it would have been fatal and 30,000km in a month would be in itself no small achievement. Just 40,151,340,095,632.9km left. Next stop Proxima Centauri! We'll be there in no time!!* (no time=127,231,792 yrs)*
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September 29th, 2020 | #28 | ||
fluxmaster
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October 1st, 2020 | #29 |
RaHoWarrior-SKINHEAD
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You have to multiply the mass of the object (I don't know what that is) by the acceleration to get the G.
Please see the section 'Calculating One G' - https://sciencing.com/convert-newton...e-8720337.html Also in the section 'Direction Matters' regarding upward G-force. Accelerating at a rate that produces 1G wouldn't get you off the ground.
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October 1st, 2020 | #30 | |
fluxmaster
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However, when people talk about "pulling 3 G's," or "pulling 6 G's," the number of G's, 3, 6, or whatever, refers to acceleration, specifically, the acceleration compared to gravity on earth. In other words, 1 G is 10 m/sec², 3 G's is 30 m/sec², 6 G's is 60 m/sec², etc. You may hear someone say "a force of 6 G's," but that is sloppy speech, as the speaker is referring to acceleration, not force. All of the above is taught in high school physics and is very basic. If you are trying to learn physics on your own, that is commendable, but there are pitfalls involved in reading different sources, some of which may use terms accurately and some of which may not. Also, sometimes the same terms may have different meanings in different contexts, for example, G may refer to the gravitational constant, which is quite different from what we are talking about here. This can be confusing if you are trying to learn without a teacher. That is correct. To get off the ground, you'd probably need at least 4 G's. However, once you have reached escape velocity, the current procedure is to let the spacecraft simply coast to its destination at zero G's (i.e. no acceleration). By increasing that to just one G, you could eventually pick up as much speed as desired, until you approached the speed of light.
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October 4th, 2020 | #31 | ||
RaHoWarrior-SKINHEAD
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When you worked out your acceleration and me and your math pointed out that you hadn't moved a foot in over a month you dismissed us both. Now, when I've put together a series of virtual puppet shows to convince you that you must accelerate, suddenly you floor it? Well you missed quite a show, I've already uploaded cannon guy... 4 Gs is enough to cause loss of consciousness. But never mind about that. Because despite the many articles waxing long about the possibilities of Proxima Centauri b, one thing had gone woefully under reported... It was determined years ago that there is no likelihood of the planets in that system being habitable. From 2018, 'Proxima Centauri just released a flare so powerful it was visible to the unaided eye' - https://phys.org/news/2018-04-proxim...l-visible.html It turns out superflares are a common occurrence. - 'Essentially, this and other studies have concluded that any planets orbiting Proxima Centauri would not be habitable for very long, and likely became lifeless balls of rock a long time ago.' There are plenty of lifeless rocks right here in this solar system. Quote:
Most of the money seems to be going toward cramming as many satellites as possible into the sky.
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October 4th, 2020 | #32 | ||||
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The Apollo astronauts experienced 4-G when they lifted off from earth. How many Gs did the Saturn V have on launch? Quote:
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October 6th, 2020 | #33 |
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No, that is the discussion, hence the title of the thread 'Proxima Centauri Colonizing Mission'. That it has been determined uninhabitable could not be more pertinent. What certainly is the topic of another discussion is Apollo.
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October 6th, 2020 | #34 | |
fluxmaster
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Alpha Centauri: How Habitable Is Our Nearest Solar System? Alpha Centauri B may have "superhabitable" worlds If you have any further relevant information, I am certainly interested in reading it.
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October 10th, 2020 | #35 | |
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Alpha Centauri AB, via 8-inch Schmidt Cassegrain c8 Telescope A couple of good scientific papers I've read recently: Requirements and limits for life in the context of exoplanets https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4156692/ Exoplanet Biosignatures: Observational Prospects https://www.ncbi.nlm.nih.gov/pmc/art...pmid/24927538/ Also, a good resource on exoplanets: NASA Exoplanet Archive https://exoplanetarchive.ipac.caltech.edu The Mikulski Archive for Space Telescopes http://archive.stsci.edu
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October 11th, 2020 | #36 |
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Hopefully once the James Webb Space Telescope is launched, it can make more detailed observations of the Alpha Centauri system to see if these planets can support human life. Proxima b, however, looks less promising from the current data, but there is the possibility underground settlements can built there to protect against Proxima Centauri's solar flares and lethal radiation. I hope I can live long enough to at least see something like Breakthrough Starshot sent on its way there, but probably not long enough for it to reach its destination.
https://en.wikipedia.org/wiki/Breakthrough_Starshot
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October 11th, 2020 | #37 |
fluxmaster
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Here's an interesting video about the upcoming launch of the James Web Telescope.
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October 12th, 2020 | #38 | |
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Hubble Space Telescope - https://www.nasa.gov/mission_pages/h...ain/index.html
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October 12th, 2020 | #39 | |
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I can't wait to see some of JWST's images, too.
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November 22nd, 2020 | #40 |
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Couldn´t you theoretically use gravity found in the destination solar system to help slow down, at least to some degree, for example by making flybys of gas giants or even the system´s sun?
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