Thread
:
When astronomers speculate the distance of galaxies are they talking about its....
View Single Post
Mar27-12, 10:28 PM
#
2
russ_watters
Mentor
Er, well, "now" is not a well-defined concept. The distance is is measured "now" for us here. It is how far the galaxy currently appears to be, which doesn't include any motion since the light we currently see was emitted.