Need Help Finding Information for Article

[Moloch11]

Hi folks, it's been a long while since I've posted here, but, I need help.

I'm trying to write an article for the "Space News" board on another forum I'm a member on; about inter-galactic voids and supervoids. The problem is that I keep finding measurements for their size in both megaparsecs and light years. When I do the math to convert from megaparsecs, though, to keep it simpler for folks who have never heard of a megaparsec, I get conflicting results, especially when I check them against what I already have both measurements for.

Also, I'm getting measurements for some that vary wildly from one another. For example, I'm getting a diameter measurement of about one billion light years for the Eridanus supervoid, but other sources I have seen put its diameter at three and a half billion light years.

While this is not an academic article; I do care about the quality of my work and I also am trying to get folks interested in something worthwhile.

Any resources you folks can point me towards that will give me a definitive answer and can tell me the diameters of these structures in light years, instead of megaparsecs, would be appreciated.

 

[bcrowell]

Also, I'm getting measurements for some that vary wildly from one another. For example, I'm getting a diameter measurement of about one billion light years for the Eridanus supervoid, but other sources I have seen put its diameter at three and a half billion light years.

Isn't an astronomer defined as someone who considers one billion light years to be the same as three billion light years, to within error bars?

 

[Moloch11]

Isn't an astronomer defined as someone who considers one billion light years to be the same as three billion light years, to within error bars?

Probably. However, I'm writing this article for laymen. Shoot, I'm not much more knowledgeable than they are.