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Old 07-12-2019, 05:43 AM
 
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Actually, if you want to propagate, you'll probably want to do that by means of sex.


If you want to move, you'll do that by means of technology like rocketry, solar sails, etc.
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Old 07-12-2019, 07:01 AM
 
Location: Somewhere in northern Alabama
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Quote:
Originally Posted by turf3 View Post
Actually, if you want to propagate, you'll probably want to do that by means of sex.


If you want to move, you'll do that by means of technology like rocketry, solar sails, etc.
Ummm, waves propagate through space. (Not the military women, parts of the electromagnetic spectrum.) No sex is involved. The term is not quite right though, as it is commonly used for non-physical "objects", if that makes any sense. Example: A radio show (as an "object") contains information that is propagated over the airwaves (which is a misnomer itself). Propaganda has the same root, similar in meaning to distribution.

IIRC, solar sails don't get pushed to any great extent by photons, but by the high speed particles, such as those that are released in coronal mass ejections. Solar parachutes might be a more apt description, as sailboats have a keel that can be used to help sail against the wind.
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Old 07-12-2019, 10:42 AM
 
Location: Seattle
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Originally Posted by NJ Brazen_3133 View Post
Which actually brings me another question, I wrote in the OP. How does gravity, and Magnetism propel itself across space? I thought Magnetism, and electricity need matter to touch each other to transport itself.
Gravity through waves and distortions in space-time, magnetism through EM fields, and electricity through ions/plasma.
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Old 07-13-2019, 01:14 AM
 
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Gravity control can definitely be used to propel a mass thru space.



From the old high school physics class experiment, the 10" counter rotating magnetic rings produces a small 'toroidal area of anti-gravity' on the inside, where a mass can hang suspended in mid air ( in this case, a paper clip), the next step is how to figure out a way to propel the mass in a direction using that same force.


* Ever since high school, I have always wanted to scale up that experiment and see if I could create an area of anti-gravity, powerful enough, to keep 350-500lbs of mass suspended in mid air, I figured I would need to use roughly 12ft dia steel rings, and a small electric motor to get them spinning (counter-rotating), up to the RPM.
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Old 07-13-2019, 12:35 PM
 
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Originally Posted by rjshae View Post
Gravity through waves and distortions in space-time, magnetism through EM fields, and electricity through ions/plasma.
But how does an EM field expand through space? Is an EM field itself just a chain or net of matter that is flying around space. And if so, does the matter have to be touching each other?
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Old 07-13-2019, 03:14 PM
 
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Originally Posted by NJ Brazen_3133 View Post
But how does an EM field expand through space? Is an EM field itself just a chain or net of matter that is flying around space. And if so, does the matter have to be touching each other?
Electromagnetic waves don't need a medium to propagate and can therefore travel through the vacuum of space. Electromagnetic (EM) radiation includes radio waves, microwaves, X-rays, gamma rays and light. EM energy is present everywhere in the universe.
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Old 07-13-2019, 03:28 PM
 
Location: Ohio
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Originally Posted by NJ Brazen_3133 View Post
Is propellant the only way to propagate through the vastness of space?
I don't know. That's a good question.

Quote:
Originally Posted by NJ Brazen_3133 View Post
Is gravitational pull considered a form of propagation?
No, not to mention it wouldn't work.

For every celestial body, there is an escape velocity which you must achieve to escape the gravity of that celestial body. On Earth, that's roughly 17,500 MPH. Obviously, the escape velocity on the Moon is a lot less, because of its lesser mass.

There's an escape velocity for our Solar System, too.

You have to exceed that speed in order to leave the Solar System.

Consider that comets often have speeds of 150,000 MPH to 170,000 MPH and they're trapped in our Solar System.

That gives you an idea of how fast you'd need to be going to leave the Solar System, which probably in excess of 200,000 MPH and gravity isn't going to achieve that.

Quote:
Originally Posted by NJ Brazen_3133 View Post
How does electro-magnetism travel through vacuum like photons?
Because it is photons. Photons/waves same-same.

Quote:
Originally Posted by NJ Brazen_3133 View Post
Photons are being projected, but doesnt it need an opposite and equal action for it to shoot out? What is that action?
Apparently, either strong or weak nuclear force.

If you look at fission in a nuclear weapon, with the fissile material being either U235 or Pu239, the neutrons that are kicked out move at 44,500,000 MPH, assuming they're fast-moving neutrons. Not all neutrons are. Some are moderate or slow speed, but it's still a helluva lot faster than a comet.

You could use a nuclear reactor. Contrary to popular belief, they're not big giant things. You can make them small enough. I'm guessing no one's seen a test-reactor. You can make them smaller than that even, like the size of a lavatory on a plane.

Seeing how Space is 3.7°K I don't imagine cooling would be a problem.
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Old 07-13-2019, 06:23 PM
 
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Originally Posted by Mircea View Post
For every celestial body, there is an escape velocity which you must achieve to escape the gravity of that celestial body. On Earth, that's roughly 17,500 MPH. Obviously, the escape velocity on the Moon is a lot less, because of its lesser mass.

There's an escape velocity for our Solar System, too.

You have to exceed that speed in order to leave the Solar System.

Consider that comets often have speeds of 150,000 MPH to 170,000 MPH and they're trapped in our Solar System.

That gives you an idea of how fast you'd need to be going to leave the Solar System, which probably in excess of 200,000 MPH and gravity isn't going to achieve that.
Actually, Voyager 1 which is currently traveling at about 11 miles per second or 39,600 miles per hour, or a little less, is well on its way to leaving the solar system if it hasn't already. The further away from the sun you are, the less speed is required to escape from the sun's gravitational pull.
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Old 07-13-2019, 08:33 PM
 
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Good video on antimatter propulsion.


https://www.youtube.com/watch?v=EBebWBjpWIQ
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Old 07-14-2019, 02:01 PM
 
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Originally Posted by Mike555 View Post
Electromagnetic waves don't need a medium to propagate and can therefore travel through the vacuum of space. Electromagnetic (EM) radiation includes radio waves, microwaves, X-rays, gamma rays and light. EM energy is present everywhere in the universe.
But then what about magnetism, or electricity like a lightning bolt? Can that travel through space?

The Earth's Magnetosphere extends beyond our atmosphere. I am curious how it does that.
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