We understand cosmology by building models that we can trace back through time, but nothing about these models limits them to the past. As the universe expands, faster and faster pushed by dark energy, when does that acceleration outstrip gravity? And when do the last stars form?
Will future gamma-ray space telescopes be able to detect gamma-rays coming from invisible dark matter halos?
There’s lots of them out there. The answer to some of the mysteries of the universe could be hidden in their numbers.
Could LIGO have detected dark matter? Maybe dark matter is actually billions and billions and billions of black holes.
Today’s paper explores the origin of unexpected gamma-rays in our Galaxy.
Today’s paper constrains cosmological parameters from one of the largest ground-based astrophysical surveys ever undertaken – DES. An insight into their first-year’s data analysis, released in August 2017.