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Prague
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Orbits
What does our galaxy orbit?
more questions will follow once previous ones are answered
What does our galaxy orbit?
more questions will follow once previous ones are answered
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Prague said:So what's the great attractor orbiting?
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New questions: answer if you'd like.
If one were to be placed 4.5 Billion years away, would they be able to see the creation of the solar system? If yes, which I believe you will say is true, to what extent would they be able to see it? Would they be able to see just the light emitted or would they be able to see details such as the planents? Hypothetically, let's say they had a telescope that could magnify their vision to be able to see an ant on the street (this is still 4.5 Billion light years away) would they be seing the present time? Or would they still be seeing the creation of Earth because the light they see is arriving at that spot from creation? I will clarify this more if it sparks some interest, I think you'll get what I am getting at though.
misskitty said:Huh, learn something new everyday. We hijiacked the thread, so in an attempt to get back on topic; what does our galaxy orbit? Other galaxies?
C and D arent analogous quantities, I don't understand what your getting at.Prague said:This is very interesting, bare with me I do not know if I will be able to successfully express my thoughts.
Ok, so we have a guy 4.5 billion light years away looking at the Earth through a high (very high) powered telescope. Now, Earth (present) will be point A, the man Point B. The Earth at present time is C and the light of the Earth which is 4.5 billion years away from Earth is D.
Questions:
If B is at the same position as D why would he need a high powered telescope to view earth? (I have some sort of answer, I suppose that the light is just a continuous image, so it shows the Earth still 4.5 billion light years away so you would need to magnify it, correct?)
If he was able to magnify it so he could see say a volcano on Earth how is this possible? After all it's light that is moving not the volcano. Does this means that everything is simply a form of light? At this moment a snapshot of me is being sent out into space at 186,000 miles a second?
(this next one is just an absolute sci-fi question, I am not sure why I am even bother asking it.)
If this light emits the image of everything, would it be possible to travel within the light? This is how I view all the questions I am asking, a snapshot of a second is taken and it then begins traveling through space at the speed of light, if you view this "light image" you see what was happening at that present time. Now could you ever go in that "light image?" I suppose if you could, time travel, atleast to the past would be possible, although we could never catch up with Earth's "light images" we would have to be traveling the speed of light and even at that speed the image of a second before us will always remain a second before us. (odd, now i understand the twin paradox and the time dilation, glad i asked this odd question now. so, time stops when you travel the speed of light?)
misskitty said:Yes it would. It would have some pretty awesome pictures though. Some of the pictures I have seen from the Hubble telescope have a lot of colour in them. Is that colour really there or is that just something that gets added to make the pictures look that much more intriguing?
Just try to picture someone standing next to you waving at you, what your eyes get is a stream of photons each at a different frequency depending on the color of light emitted from a certain region infront of you. Their hand is brown let's say, since the hand is moving you'll see brown light coming from different regions inthe space infront of you. Your brain will identify this as an 'object' and focus it. However that's not all you see, you get a lot of ambient light from things around you like the sky, buildings, everything. Now this light is transmitted in every direction from the source, not just straight at you. Light doesn't know you are there.
The sun is a star located at the center of our solar system. It is a giant, glowing sphere of hot gas that provides light and heat to all the planets in our system.
Our galaxy, the Milky Way, is estimated to be about 100,000 light years in diameter. It contains hundreds of billions of stars, including our own sun, and is just one of many galaxies in the universe.
The current estimated age of the universe is about 13.8 billion years. This age is based on observations of the cosmic microwave background radiation and the expansion rate of the universe.
While there is currently no definitive evidence of extraterrestrial life, scientists believe that the conditions for life may exist on some other planets and moons in our solar system. There are also ongoing efforts to search for potential life on exoplanets outside of our solar system.
Dark matter and dark energy are two mysterious substances that make up the majority of the universe. Dark matter is an invisible material that cannot be directly observed but is thought to make up about 27% of the universe. Dark energy is a force that is causing the expansion of the universe to accelerate and is estimated to make up about 68% of the universe.