1
$\begingroup$

Differentiation of scale factors means the rate of expansion. But at the same time,

recession velocity has the following relationship: $\dot{𝑑}=\dot{𝑎}𝜒$

Do the recessional velocity and expansion velocity mean the same thing? (when co-moving distance is fixed)

$\endgroup$
1
$\begingroup$

Yes both mean the same velocity.

$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.