Recent content by Nancy

Probably not, both because those clouds don't weigh that much compared to their suns, and because if they were more massive they would obscure more light. Wornout neutron stars and stellar mass black holes might better account for the missing mass.

#3 - Aliens would not have to be using unknown technology to communicate, for us not to hear it; merely targeted tech. Think how narrow a sightline could possibly catch a laser communication with one of our space probes. And because everything is always in motion, that sightline won't repeat...

How does the telescope show that these very distant galaxies are not simply being viewed edge-on?