But they also depend on how far away it is, how fast it is drifting by, and how close it is to the line of sight.

ECONOMIST: The dark side of cosmology

CMB, it is possible to deduce how far away they are, and thus how old the universe is.

ECONOMIST: The universe

When a signal bounces back from the GPS-enabled device on the Earth, it can tell exactly how far away that device is.

FORBES: GPS Navigation From The Wrist

So, in other words, if we judge society by how well it serves the poor, then free enterprise is far and away the greatest anti-poverty program known to man.

FORBES: Policies Meant To Achieve Equality Are Very Unfair To The Least Equal