Question 1: Totally collapsed object (two words)

Question 2: Measure of Starshine

Question 3: Plot of new stars on the H-R Diagram

Hi Mastj10,
I assume the answer to the first one is "black hole."
For the second, perhaps "lux" or "candela"?
Sorry I can't come up with anything else for the others at the moment. :)

I think black hole, also, for #1. Does it fit?

As for the others: How many letters - and do you have any of the letters?

How many letters for each?

Black hole for #1?