I have another question plz. When scientists depict the image of our galaxy do they calclulate where they are now by calculating their trajectory or use the images they recieve of them of where they were thousands of years ago? I mean the stars are not equal distant from each other as they were thousands of years ago. The night sky would look completely different in thousands of years wouldnt it? The scientists must pick a specific date so all stars are in the same time zones to get a accu image
@requshei No. The images are real and they are not empered in anyway. They show the star locations in the past in real but to us it is present. It is like you are in an aeroplane and you suddenly you saw another plan coming opposite direction. You go your camera and took a photo. You got a nice photo of the aeroplane but when you look outside, the aeroplane has gone. In other words, the image are created of the real light of the starts not a fake one.
By the 13.5B L-Y is the limit how far hubble can see. It is well possible (in my view) that there are galaxy farther than that, but the Hubble just can not resolve it. The faster the galaxy moves away the properties of it light changes and it it move too fast, the light it emit will change so much that it will not be light anymore for us. It will change into microsowaves instead. So the Hubble won't be able to see it because it picks optical device (it picks only light).
Hi, very nice video. I still have one more question though.. So, we can see galaxies in all directions of a 13.5 billion light years radius from the earth. Isn't there a possiblity that some galaxies the farthest point they could see other galaxies are 20 billion light years away and at the very opposite direction only 7 billion light years away even though it looks like, from their point of view, they are at the center of the expansion...? (The numbers are just temp, maybe they will get bigger)
@requshei This could be theoretically true but there are some complications. When we talked about expanding gas example, we know the gas does have some volume so you can say the molecule near the edge will also be near the edge when the gas expanded. Universe is different. Universe started from infinitesimal small dot that had no volume, so that assumption do not apply. so in that case every molecule/galaxy in Universe will be able to see 13.5B L-Y around it. It is just theoretical at this point
@bot06 Thank you for taking your time to explain. You were very helpful and so was this video. I'm just an average guy trying to understand whats happening out there. hehe.
I have another question plz. When scientists depict the image of our galaxy do they calclulate where they are now by calculating their trajectory or use the images they recieve of them of where they were thousands of years ago? I mean the stars are not equal distant from each other as they were thousands of years ago. The night sky would look completely different in thousands of years wouldnt it? The scientists must pick a specific date so all stars are in the same time zones to get a accu image
requshei 6 months ago
@requshei No. The images are real and they are not empered in anyway. They show the star locations in the past in real but to us it is present. It is like you are in an aeroplane and you suddenly you saw another plan coming opposite direction. You go your camera and took a photo. You got a nice photo of the aeroplane but when you look outside, the aeroplane has gone. In other words, the image are created of the real light of the starts not a fake one.
bot06 6 months ago
By the 13.5B L-Y is the limit how far hubble can see. It is well possible (in my view) that there are galaxy farther than that, but the Hubble just can not resolve it. The faster the galaxy moves away the properties of it light changes and it it move too fast, the light it emit will change so much that it will not be light anymore for us. It will change into microsowaves instead. So the Hubble won't be able to see it because it picks optical device (it picks only light).
bot06 7 months ago
Hi, very nice video. I still have one more question though.. So, we can see galaxies in all directions of a 13.5 billion light years radius from the earth. Isn't there a possiblity that some galaxies the farthest point they could see other galaxies are 20 billion light years away and at the very opposite direction only 7 billion light years away even though it looks like, from their point of view, they are at the center of the expansion...? (The numbers are just temp, maybe they will get bigger)
requshei 7 months ago
@requshei This could be theoretically true but there are some complications. When we talked about expanding gas example, we know the gas does have some volume so you can say the molecule near the edge will also be near the edge when the gas expanded. Universe is different. Universe started from infinitesimal small dot that had no volume, so that assumption do not apply. so in that case every molecule/galaxy in Universe will be able to see 13.5B L-Y around it. It is just theoretical at this point
bot06 7 months ago
@bot06 Thank you for taking your time to explain. You were very helpful and so was this video. I'm just an average guy trying to understand whats happening out there. hehe.
requshei 7 months ago