3 ms·
Because the “edge” of our universe where we see the CMB is not a point in space we are viewing in real time that is currently emitting the CMB. That edge is a
by wolfendin 3y ago
Because the “edge” of our universe where we see the CMB is not a point in space we are viewing in real time that is currently emitting the CMB.
That edge is a sphere in space that was far enough away when the CMB was emitted in the past that we only see the light from it now.
- oneshtein 3y agoYep, but this sphere must have radius up to 14Bly, to be part of BB.
- devoutsalsa 3y agoThe observable universe has a diameter of about 47 billion light years! https://imagine.gsfc.nasa.gov/educators/programs/cosmictimes/educators/guide/age_size.html https://imagine.gsfc.nasa.gov/educators/programs/cosmictimes...
- oneshtein 3y agoThen we need to move the time of BB to 47/2 = 23.6By. Moreover, we should do that every time when we improve our telescopes.
- devoutsalsa 3y agoCorrection... I meant radius of 47 billion light years. It's about 94 billion light years across!