The cosmic microwave background tells us a great deal about the origin and history of our universe. But how?
So You’re Saying I’ve Got a Chance
New research questions the claim that the universe is accelerating. But this new work isn’t as strong as some claim.
Rock of Ages
A natural fission reactor allows us to look at physical constants over time, and through it we can put astrophysics to the test.
Foamy Evidence
New observations of distant quasars find no evidence for quantum foam, and proves that the universe is not a hologram.
Perspective
Our view of the night sky connects us to the history of the cosmos.
The Left Hand of Darkness
The universe is made of matter, but particle physics shows that matter and antimatter should be created in equal amounts. So where’s the antimatter?
Across the Universe
Just how far is the most distant galaxy known? That depends on what you mean by distance.
Is There Anybody Out There?
An infrared survey of 100,000 galaxies finds no evidence of so-called Kardashev-type alien civilizations.
Stoking the Fire
Fluctuations in the cosmic microwave background are due in part to a combination of gravity and cosmic expansion known as the Sachs-Wolfe effect.