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[CSM] Runaway planets ejected from galaxy at insane speeds - Page 10

post #91 of 98
Quote:
Originally Posted by Demondrumer View Post

well i have no qualifications to prove my point... im just throwing in ideas tongue.gif

Ah, not to worry about that. curiosity and opinions are not sins. rolleyes.gif
Quote:
Originally Posted by Demondrumer View Post

but Ive always been intrigued by physics and the wonders that are involved with it!!

Yes, physics is intriguing. So here's a cool thing.

You think that the unfortunate planets are being ejected at unbelievable speeds? Well, the supermassive black hole at the center of our galaxy whips massive stars around it at speeds of more than a million miles per hour. In fact, there is a star, named S2, which closely orbits the black hole and has speeds of about 11 million miles per hour at its closest approach (that's like 5000 km per second; and remember its a massive star).
Edited by Gaurav Bhattacharjee - 3/28/12 at 6:33am
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post #92 of 98
Quote:
Originally Posted by Gaurav Bhattacharjee View Post

Ah, not to worry about that. curiosity and opinions are not sins. rolleyes.gif
Yes, physics is intriguing. So here's a cool thing.
You think that the unfortunate planets are being ejected at unbelievable speeds? Well, the supermassive black hole at the center of our galaxy whips massive stars around it at speeds of more than a million miles per hour. In fact, there is a star, named S2, which closely orbits the black hole and has speeds of about 11 million miles per hour at its closest approach (that's like 5000 km per second; and remember its a massive star).

That's not fast at all wink.gif

I wish we could figure out a way to capture the light that has traveled from earth. Imagine if we could see the light has been traveling for a 150 million years. We could see what the Jurassic period looked like.
.
Imagine Aliens on a planet 20 light years away. If they had a telescope powerful enough to see earth theoretically they would be looking at us in 1992.
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post #93 of 98
thats what i always thought!! if we could send a satellite back so the image takes around a day to arrive , we could watch outdoor crimes tongue.gif well the camera would be mental... but u know wat i mean smile.gif
post #94 of 98
Thats so cool but it's still too slow for space travel.
post #95 of 98
Quote:
Originally Posted by CarlosSpiceyWeiner View Post

http://en.wikipedia.org/wiki/Alcubierre_drive
No need to break the laws of physics to travel faster than the speed of light.
Freezing humans to wake them up in several hundred years is less likely than traveling faster than the speed of light (in a "warp" bubble that is). Quantum entanglement communication is on the verge of becoming a reality; giving us the ability to communicate literally across the universe without time lag.

Personally I think we are vastly closer to being able to freeze (and revive) people, or make them outright ageless, than we are to being able to make a working Alcubierre drive. The problems of age and the causes of cellular damage that result during freezing are well understood. How to make warp bubbles to ride around in is not. The Alcubierre drive is purely speculative at this point, and no one has the faintest idea how one could be made.
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post #96 of 98
Quote:
Originally Posted by Kappy03 View Post

It's probably not the answer, but could concepts similar to the "slingshot around the moon" concept in the Apollo 13 space mission, be applied to high speed space travel? Like twirling a toy plane around on a string. All that's needed is for something to cut the string for it to go flying of tangent to it's circular motion. Nuclear propulsion perhaps. A nuke shoots off a space craft like it was the bullet inside of a gun barrel. The difference is that the additional velocity of the orbit is added on. Am I somewhere in the ballpark with this explanation?
Addressing the mass debate (no pun intended smile.gif ) : I'm pretty sure mass isn't affected by speed in a vacuum. Mass absorbing energy means it is being accelerated or heated (or reflecting light?). Mass traveling at the speed of light is impossible though because it cannot exist. Time is slower the closer you get to the speed of light and at the speed of light, time equals zero. Mass cannot exist in a "zero" amount of time.
Question: As we all know, it takes 8 minutes for the light of the sun to reach Earth. So, what would happen if the sun instantaneously disappeared? Would the Earth be thrown out of orbit and into deep space BEFORE we saw the light disappear? Or, would we be thrown out into deep space 8 minutes AFTER the sun disappeared? (At the same time we saw the disappear). smile.gif
Quote:
Originally Posted by sintricate View Post

My guess is that the missing sun's gravity will be noticed before the missing light. I have no proof/evidence to back that claim up but thats just my guess.
Quote:
Originally Posted by Carniflex View Post

Yeah the gravitational slingshot can be used pretty well. Although there might be some practical difficulties involved in implementing it with a planet size body at our current tech level. More so when you near the speed of light as random particles in your path which do happen to have a mass will hit you with immense kinetic energy. Photons, which do not have mass, will shift into very high energy levels and you will bathe in X-Rays from the direction you are traveling to while the stuff "behind" you will shift into radio frequencies (bcos of Doppler shift)
Time, btw, is also frame of reference depended quantity in general relativity. If you are sitting on a planet traveling at near light speed "your" time is pretty regular as is your mass. Now for outsize observers, however, seeing you zip past them you would seem to have different time and mass (or more precisely it boils down to an energy and energy density at the end of the day).
The consensus seems to be, that we would feel the "disappearing of sun" approx 8 minutes after it dissapears. We dont know yet the exact properties of the particle causing stuff to have mass, but general assumption is, that it travels at near light speed.
I'm not an expert of general relativity btw so if I have made any mistakes feel free to correct me. The "point" of general relativity for me is to make Newton laws invariant under Lorentz transformation. So its somewhat simplistic and probably a bit naive approach to the theory quite possibly overlooking all the finer effects.

Since nothing can travel faster than the speed of light, neither can the energy and force of the gravitational pull of the sun. In the hypothetical (because impossible) case of the sun spontaneously disappearing, the time we see the light vanish and the time the earth gets flung out of its orbit will be equal to a great extent (the only difference would be due to the distance between the center of the sun where its theoretical - for purposes of calculation - center of gravity is, and its outer surface, from which we see the light emitting).

A different method of explaining this would be in terms of the space-time fabric of our solar system, where the curvature of the hole by the gravity of the sun is caused by a point mass (representing its CoG again). When the sun disappears, instead of the entire fabric tensing out instantly, it would cause a ripple effect like a droplet in a pool, with the fabric being unaffected until the wavefront (travelling at c and representing gravitational pull - or rather lack of it) hits the earth.
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post #97 of 98


 

Quote:
Originally Posted by Kappy03 View Post

Quote:
Planets in tight orbits around stars that get ejected from our galaxy may actually themselves be tossed out of the Milky Way at blisteringly fast speeds of up to 30 million miles per hour, or a fraction of the speed of light, a new study finds.
http://www.csmonitor.com/Science/2012/0323/Runaway-planets-ejected-from-galaxy-at-insane-speeds
Could using the gravitational pull from celestial bodies be the answer to long distance, high-speed space travel?


 

We used the gravitational pull from Jupiter for the Cassini-Huygens space probe.

Interesting read;

 

http://saturn.jpl.nasa.gov/mission/missiongravityassistprimer/

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post #98 of 98
i cant imagine what planets accident are, that would be unlike cars thats smashing
Edited by phinexswarm71 - 4/3/12 at 7:29pm
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