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Viewing Earth (sun) in the past through satellites?
If it is true that the light we are seeing from other galaxies is light that began traveling our direction long long ago, is it possible to see the earth at some distant historical time and place through a satellite?
Am I overthinking it, or should the location of the earth (or sun) a million years ago be viewable since our solar system has been drifting through the universe?
Maybe it's not possible, since we are not moving as fast as the speed of light??
Is the location of that background radiation then believed to be in the center of the universe?
There is no "center" in the universe.
There is no inside nor outside of the universe.
Everything in the universe happens on some sort of expanding spacetime "skin".
See "String" and "Brane" theories for that.
Is the location of that background radiation then believed to be in the center of the universe?
No, it's coming from a sphere that is about 13 billion light years around us. The big bang happened everywhere in space, so these are the photons from the big bang that are just reaching us.
No, it's coming from a sphere that is about 13 billion light years around us. The big bang happened everywhere in space, so these are the photons from the big bang that are just reaching us.
The Big Bang happened when spacetime was only a fraction of what it is today. Actually there never was a 'bang'. Just a superfast growth of spacetime. Note that we and everything else in the universe are part of that same expanding "sphere" that you mentioned. A four dimensional universe with width, lenght, height, and time. Einsteins acclaimed "expanding balloon" suggestion is a good three dimensional representation of that. (All other claimed dimensions still have to be proved to exist) ...
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The Big Bang happened when spacetime was only a fraction of what it is today. Actually there never was a 'bang'. Just a superfast growth of spacetime. Note that we and everything else in the universe are part of that same expanding "sphere" that you mentioned. A four dimensional universe with width, lenght, height, and time. Einsteins acclaimed "expanding balloon" suggestion is a good three dimensional representation of that. (All other claimed dimensions still have to be proved to exist) ...
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No, the CMBR sphere i'm referring to is due to the expanding light cone that grows at 1 light year per year (actually slightly more due to the expansion of spacetime).
No, the CMBR sphere i'm referring to is due to the expanding light cone that grows at 1 light year per year (actually slightly more due to the expansion of spacetime).
No, the CMBR sphere i'm referring to is due to the expanding light cone that grows at 1 light year per year (actually slightly more due to the expansion of spacetime).
The cone is just the shape on a 2Dspace-1Dtime graph, "light cone" is a term we use a lot. The actual shape in 3D space is a sphere (or pretty close to one) due to the uniform speed of light.
If light particles are given off during lights travels, does that mean there is a point when the light would stop because all of the particles have been given off.
Is it possible to follow the path of particles given off?
With the Hubble telescope viewing images closely connected with the Big Bang, why is that evidence still visible? Shouldn't that light also be invisible to us since it would have been traveling faster than we moved?
It's my understanding that light travels at speed of light, based on measurable perspective. Meaning that if your on a spaceship traveling at the speed of light. The lights in the spaceship work fine because from your perspective the lights aren't traveling faster than the speed light. So your flashlight would also work just fine from your ship but if I was trying to see the flashlight from a point outside your ship I would not see the light from the flashlight or the flashlight for that matter until it either past me or hit me because you can't see an object going the speed of light because your vision is based on the light bouncing off the object so if the object is going the speed of light the light that bounces off can't be seen until the object would have already gotten there in the first place.
The mirror experiment would be interesting. I'd be interested in trying that, 500,000 light-years away might be tough but 16 minutes away might be doable.
It's my understanding that light travels at speed of light, based on measurable perspective. Meaning that if your on a spaceship traveling at the speed of light. The lights in the spaceship work fine because from your perspective the lights aren't traveling faster than the speed light. So your flashlight would also work just fine from your ship but if I was trying to see the flashlight from a point outside your ship I would not see the light from the flashlight or the flashlight for that matter until it either past me or hit me because you can't see an object going the speed of light because your vision is based on the light bouncing off the object so if the object is going the speed of light the light that bounces off can't be seen until the object would have already gotten there in the first place.
The mirror experiment would be interesting. I'd be interested in trying that, 500,000 light-years away might be tough but 16 minutes away might be doable.
They have mirrors on the moon for precise range-finding, I wonder if they're big/useful enough to see a reflection of the earth. You'd be able to see ~2 seconds into the past
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