Hi Nabeshin .
I think it would be helpful if I post the actual question than wrongly restating it.
When you say:
I have few follow up questions to ask..
1) Does that refer to a cluster of galaxies ?
2) if dark energy density stays constant does that mean it's homogeneous , as in not being concentrated at a point ?
Here's the question:
P.S : 'v' is the recessional speed of the galaxy.