“If you think this Universe is bad, you should see some of the others.” -Philip K. Dick
When it comes to measuring the expansion history of the Universe, the concept is simple enough: take something you know about an object, like a mass, a size, or a brightness, then measure what the mass, size or brightness appears to be, and suddenly, you know how far away that object has to be.
“Originality is the fine art of remembering what you hear but forgetting where you heard it.” -Laurence J. Peter
This past week was a super busy one on Starts With A Bang, from dark energy to stars to a fabulous book review and more! Just in the last seven days, we’ve looked at:
"To disagree leads to study, to study leads to understanding, to understand is to appreciate, to appreciate is to love. So maybe I'll end up loving your theory." -John Wheeler
Out there in the Universe, there's a lot to marvel at. Over billions of years, gravity has attracted different portions of the expanding Universe together into large superclusters and filaments, each made up of clusters, groups, and individual galaxies separated by great cosmic voids.