Observers in all reference frames measure light in a vacuum traveling at the
same speed, c. This goes all the way back to Special Relativity, and I'm
not aware of any serious conjecture to the contrary. Light from objects
moving towards us is blue shifted, while light from objects moving away from
us is red shifted, but the speed is the same in both cases.

Because of the great distances involved, the motion of stars moving
tangentially to us can only be measured over time. None of them streak.
The faster moving ones, like Barnard's star, can be seen to move over a
period of years. Otherwise, detection of proper motion is a slow and
tedious process.



"Alex Kudrasev" wrote in message
...
There seems to be some conjecture whether we see light gaining a direction
component from a moving star.

Is that correct?

Surely, if it does, we will see a 'streak' of light in the sky as light
from
various sides of the star gets to us?

Cheers,

Alex.