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Cepheid Would say a cepheid variable star in a galaxy moving at 150,000 mps away from us appear to blink slower and how would this slow blinking, if so, be related to the redshift at which it was detected?

Yes that is probably correct.

If quasars are appearing to travel at almost the speed of light from us, what would the relative time frames between us be.

In that case, could there be enough neutrinos orbiting the galaxy to account for some "dark" matter?

Thanks you for your reply, I meant within by which a neutrino can pass through mass without likleyhood of collision so a neutrino in an eccentric orbit could pass through the sun on part of its orbit perhaps.

Does this mean that neutrinos could be orbiting within a large enough mass?

Does a black hole bend the space that photons travel in so that they are bent towards it? How would gravity attract a photon if they have no actual regular mass? Also, are neutrinos attracted to black holes and sucked in (theoretically?)

So whatever inertial frame one is measuring by, light travels at c as if the inertial frame was still?

the speed of light is 186000 mps or some such compared to what? :)

It doesn't click because I don't know how to draw a space time diagram yet.

Thank you Janus this is very interesting!

I am quite familiar with the twin paradox. I was just wondering what would happen in this new twist on it. Thank you for your help.

Are you saying that the galaxies are relatively still while the space between them increases? If I could take a physics or cosmology class I would. :) Thanks for your help.

Im not sure you understand. He is never accelerating away from the galaxy, he is decelerating away from the galaxy. until he is moving slower than it. Thanks for your help.

Also, if there were a white light on the ship, what would the shift in frequency beto someone on a planet in the galaxy?

Okay, lets say one is leaving the galaxy. The galaxy appears to be moving quite fast in a certain direction. Lets say a ship decelerates to the point to where it is nolonger moving with the galaxy. To the observers in the galaxy, the ship is now moving (accelerating apparently) away from...

Then how could the new devices hinted at in the new scientific american measure different gravitational variances that are stable over parts of the earth. If these variances are stable then they have to be location specific on the earth and thus rotate with it?

Thanks for your help! So is it pressure created by acceleration perhaps that causes the effect? Also, could it be theoretically sound that the accelerating object could be seen as a decelerating object, with the rest of the universe seen as remaining at a fixed speed? Would the properties of...

If the universe has a width it has a center? Has anyone tried to find the center?

So you are saying that acceleration and not relative speed is the factor?

It seems to me that the energy from an asteroid crashing into the earth at high speed and of the earth crashing into the asteroid at the same high speed would be the same. The potential energy of both the earth and the spaceship go up equally as the spaceships propulsion accelerates it? As...

Perhaps by looking at the processes that create a black hole one could say it is not likely full of milk. But I'm not sure it could be proven.

"For one, it isn't the magnitude of gravitational force that causes time dilation, but the difference in gravitational potential" Found this on another post. Thought it might have something to do with this.

But it seems to me that both bodies could be seen to be in motion if all motion is relative. That it is merely a useful habit we are in to see it otherwise. I'm not sure you have cleared this up. Not to me anyways. :) Thanks though.

gravitons Thus the quotes :) Just trying to see what was out there about this. :)

Why is time relative when an accelerating body could be seen as accelerating away from another body at exactly the same speed as the body from which one is accelerating away from is speeding away from the first body? I. e. the bodies could be seen as accelerating away from each other at the...

If an accelerating body is identical to gravity, does this means scientists are leaning towards acceleration having to do with a somehow greater exchange of "gravitons?" Else not identical according to quantum theory?

Does the path of light from distant galaxies curve according to with or without dark matter and energy?