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ninty · 12-09-2004, 11:23 AM

[quote="Chronic Diarrhea":ab7cf]Hey Ninty, I'm taking AY 101 and 102 right now. We talked about quasars, and the appearance of it moving faster than light speed. I found it interesting. Also the aspect of time and velocity slowing down for materials that are being pulled in by black holes is pretty interesting stuff.

I don't believe that anything has visited us yet, and like Ninty, I don't think it will happen in our lifetime. The Universe is expanding, because eventually the gravitational pull of the stars, including the Sun, is becoming weaker and weaker. Same thing applies to Earth's gravitational pull, which is causing the Moon to slowly drift away. Somedat, the distance of the Moon to Earth will be great enough that the gravitational pull is not sufiicient anymore, and the Moon will just fly off into space. Same thing applies to the planets in the Solar System.

[/quote:ab7cf]

I haven't heard of Quasars moving faster than the speed of light. Thats interesting and i'm going to have to take a look at that.

As for time slowing down, when increasing speed, this is true. It is essentially time travel. The faster you go to the speed of light, the slower time goes for you. Thus when you slow down, less time has passed for you, than everyone else. This means you have traveled into the future. There is a Russian cosmonaut that spent a year or two on MIR. He holds the record for the longest time being in space. And since he was continually traveling at 17,000MPH in orbit, he has time traveled a fraction of a second into the future. I would expect the same thing to happen when entering a black hole. The gravatitional forces of a black hole are so great that accelleration once you reach the event horizion would be pretty much infinite, accellerating you to the speed of light. And thats why no light escapes from black holes. This is one way to detect black holes that aren't feeding. If it psses infront of a star, but in reality they are light years apart, astronomers can see the black hole warp the light coming from the distant star.

I don't know if it's the gravatitional pull of the stars that is getting weaker, but some other force like Dark Matter. Dark Matter was first proposed by einstein, but has yet to be proven. We do know that in space, galaxies cluster together. In our local cluster, there are about 30 galaxies. However, there is nothing in the centre of the cluster massive enough to keep all the galaxies together the way they are. Thus the theory of Dark Matter and Dark Energy comes into play. Also to back Dark Matter up again, there are stars in the outer portion of our galaxy traveling faster than they should if gravity was the only factor. Kepplars 3rd law I believe has to do with mass and gravity, and tells us that the farther out you go from the gravatitional centre, the less speed you'll ahev. However this isn't true for some reason. Dark Matter? And yes, the universe is expanding at a faster rate. You would expect that after the big bang shot everything out at near light speed, that everything would slow down, collapse in on itself and for it to happen again if the big bang is a natural occurance. It is actually said that the galaxies are speeding up on the outer edge. Again some scientists have attributed this to Dark Matter. Also there was some guy from asutralia i believe who tried to weigh the local cluster, but he go way under what should have been there for everything to stay together and function properly. Another tick for dark matter in my mind. I believe its been said about 90% of the universe is made up of matter we can't see. Thats kind of scary.

As for the whole samarian thing, very interesting, but i'm not toally up on all that stuff so i'll ahve to read a bit about it.

	(#16)
ninty is Offline Major General Posts: 12,683 Join Date: Jan 2002 Location: Calgary	12-09-2004, 11:23 AM [quote="Chronic Diarrhea":ab7cf]Hey Ninty, I'm taking AY 101 and 102 right now. We talked about quasars, and the appearance of it moving faster than light speed. I found it interesting. Also the aspect of time and velocity slowing down for materials that are being pulled in by black holes is pretty interesting stuff. I don't believe that anything has visited us yet, and like Ninty, I don't think it will happen in our lifetime. The Universe is expanding, because eventually the gravitational pull of the stars, including the Sun, is becoming weaker and weaker. Same thing applies to Earth's gravitational pull, which is causing the Moon to slowly drift away. Somedat, the distance of the Moon to Earth will be great enough that the gravitational pull is not sufiicient anymore, and the Moon will just fly off into space. Same thing applies to the planets in the Solar System. [/quote:ab7cf] I haven't heard of Quasars moving faster than the speed of light. Thats interesting and i'm going to have to take a look at that. As for time slowing down, when increasing speed, this is true. It is essentially time travel. The faster you go to the speed of light, the slower time goes for you. Thus when you slow down, less time has passed for you, than everyone else. This means you have traveled into the future. There is a Russian cosmonaut that spent a year or two on MIR. He holds the record for the longest time being in space. And since he was continually traveling at 17,000MPH in orbit, he has time traveled a fraction of a second into the future. I would expect the same thing to happen when entering a black hole. The gravatitional forces of a black hole are so great that accelleration once you reach the event horizion would be pretty much infinite, accellerating you to the speed of light. And thats why no light escapes from black holes. This is one way to detect black holes that aren't feeding. If it psses infront of a star, but in reality they are light years apart, astronomers can see the black hole warp the light coming from the distant star. I don't know if it's the gravatitional pull of the stars that is getting weaker, but some other force like Dark Matter. Dark Matter was first proposed by einstein, but has yet to be proven. We do know that in space, galaxies cluster together. In our local cluster, there are about 30 galaxies. However, there is nothing in the centre of the cluster massive enough to keep all the galaxies together the way they are. Thus the theory of Dark Matter and Dark Energy comes into play. Also to back Dark Matter up again, there are stars in the outer portion of our galaxy traveling faster than they should if gravity was the only factor. Kepplars 3rd law I believe has to do with mass and gravity, and tells us that the farther out you go from the gravatitional centre, the less speed you'll ahev. However this isn't true for some reason. Dark Matter? And yes, the universe is expanding at a faster rate. You would expect that after the big bang shot everything out at near light speed, that everything would slow down, collapse in on itself and for it to happen again if the big bang is a natural occurance. It is actually said that the galaxies are speeding up on the outer edge. Again some scientists have attributed this to Dark Matter. Also there was some guy from asutralia i believe who tried to weigh the local cluster, but he go way under what should have been there for everything to stay together and function properly. Another tick for dark matter in my mind. I believe its been said about 90% of the universe is made up of matter we can't see. Thats kind of scary. As for the whole samarian thing, very interesting, but i'm not toally up on all that stuff so i'll ahve to read a bit about it.