Physics 62.1 Understanding Space, Time & Relativity (17 of 55) Moving Source Changes Light

In this video I will explain how, similar to the Dopplar shift in sound, a moving source affects the light we see.

Next video in this series can be seen at:

[cdgt]

When the sound frequency approaches you it goes

[thomasfotiii]

Good video sir, I find these videos very insightful with a topic that can be hard to understand. Thank you

[michaelduke]

So much for the speed of light being the same in all reference frames...

[charlesbrightman]

Red shift of light as perceived in this universe:
Consider the following:
a. Our solar system is most probably being pulled toward our galactic center, hence also why we exist in a spiral shaped galaxy.
b. We would also see a red shift of energy of far away galaxies away from our own, relatively speaking. In other words, it's possible the universe is not expanding but that our galaxy is 'shrinking'. Or maybe both are really true.
c. Those solar systems between ours and the center of the galaxy would be getting pulled toward the center of the galaxy faster than ours. Hence, we would still see a red shift of energy when we look at them.
d. Those solar systems between ours and the outer edges of the galaxy, our solar system would be getting pulled toward the center of the galaxy faster than them. Hence, we would still see a red shift of energy when we look at them.
e. Only those solar systems adjacent to ours we would perceive a blue shift of energy as the galaxy shrank and solar systems became closer together. I propose checking to see if this is really true or not.

Why this matters:
1. Due to the Sun becoming a red giant one day, (yes a very long time from now, but the destination is set), ONLY those species that make it off of this Earth and out of this solar system continue to consciously survive. Everybody else dies and goes extinct.
2. If it's really true that our solar system is being pulled toward our galactic center, then ONLY those species that make it out of this galaxy eventually continue to consciously survive. Everybody else dies and goes extinct.
3. Whatever 'gravity' actually is and does what it does, some sort of artificial gravity would most probably be needed for space bases on planets and moons, (large rotating space ships won't really work for space bases on planets and moons), and low gravity conditions are very harmful to the human species over prolonged periods of time. Hence, without artificial gravity for space bases, we will probably still all die one day from something and go extinct.
4. In addition, if we don't figure out how to have necessary protection from harmful cosmic radiation, not only won't humans survive, but neither will AI's long term. All life from this Earth would probably die and go extinct with no conscious entity left to care. Life itself would all be ultimately meaningless in the grand scheme of things, at least as it concerns Earth species.

Some important questions everybody should ask them self are:
What exactly matters throughout all of future eternity and to whom does it eternally matter to?
What exactly is being done to try to save any species from eternal conscious extinction? (If it's even possible to do).