[nickik]

I don't have a question, to late to think of something smart. but look super cool and I will read some more about it. Didn't know you could do passive measurements like that.

[jrichardshaw]

Unfortunately cosmology and astrophysics is basically all passive measurements. Doing a controlled experiment would be more useful, but would probably remove half the fun!

[nickik]

I mean that you are listing to half of the night sky at once. At least that what I understood from the wikipedia page.