A proposed five-satellite Cosmic Positioning System could measure cosmic distances directly and help address discrepancies in the Hubble constant through solar system–scale triangulation.

This article was originally published at The Conversation. The publication contributed the article to Space.com's Expert Voices: Op-Ed & Insights. Australia's iconic red landscapes have been home to ...

Australia’s iconic red landscapes have been home to Aboriginal culture and recorded in songlines for tens of thousands of years. But further clues on just how ancient this landscape is come from far ...