- #1
mviswanathan
- 39
- 0
As I understand, when we say that an object is 1 Million light years away, it means that the object was that far away when the radiation left that object. Please correct me here.
Considering that the object is also moving away from us as some velocity (at the moment the radiation originated from it), that object must have been very near us some time earlier than 1 Million years. Could that point in time be the origin of universe?
On the same count, considering the origin of the universe as 13 Billion years, there must be some theoretical limit the maximum distance from which one could receive radiation now. This limiting distance has to be much less than 6.5 million years since the velocity of separation from us is less than the speed of light, where as we receive the radiation from th object at the speed of light.
With this, I am unable to understand when it is said that we have observed the Cosmic Background Radiation, which gives us the glimpse of the universe when it was 380,000 years old. (Scientific American, India - September 2009 - 'In the beginning - The Universe'.
I am not sure, I am expressing my confusion properly. I may be able to clarify if here from some one.
Thanks
Considering that the object is also moving away from us as some velocity (at the moment the radiation originated from it), that object must have been very near us some time earlier than 1 Million years. Could that point in time be the origin of universe?
On the same count, considering the origin of the universe as 13 Billion years, there must be some theoretical limit the maximum distance from which one could receive radiation now. This limiting distance has to be much less than 6.5 million years since the velocity of separation from us is less than the speed of light, where as we receive the radiation from th object at the speed of light.
With this, I am unable to understand when it is said that we have observed the Cosmic Background Radiation, which gives us the glimpse of the universe when it was 380,000 years old. (Scientific American, India - September 2009 - 'In the beginning - The Universe'.
I am not sure, I am expressing my confusion properly. I may be able to clarify if here from some one.
Thanks