Recent content by weldon

Thanks a lot for all your help tonight Wallace. Take care :)

is it 11Rthen=Rnow? Those numbers seem to make more sense...

Thanks for your help on the first one Wallace. On the second one, would you use the equation 1 + z = R-then/R-now, meaning 11= R then/r now? would you even know the scale in the equation, or is that as far as you can simplify it? this is what I typed up/found. is it true or am I on the wrong...

Awesome, so that would mean that the only limit it puts in the Hubble constant would be 11.2Gya?

Is it because a white dwarf cannot be older than the universe, thus astronomers try to find the oldest white dwarf to measure the age of the universe? so that would mean that it does not limit the age of the universe at 13Gya ?

is it you can't tell the age of the universe because you do not know the luminoisity of the white dwarf? If so, I don't really have any idea what that would mean as far as finding the limits.

Thanks for the quick response. I am not really sure what I am missing in the first question though. What is the limit that I am missing? Can i use the formula given here with the numbers it says? (13.6, 72)

Hi, I am in my second astronomy course and just received a twenty question take home final exam, and I am having trouble with two of the questions. In 2004 astronomers reported finding evidence that certain white dwarfs are 12.1 +- 0.9 billion years old. Assuming an inflationary model in...