Dark Energy
Gravastars are an Alternative Theory to Black Holes. Here's What They'd Look Like
Astronomers continue to find more and more evidence of black holes, but there's an alternative theory that could explain the…
Euclid Begins its 6-Year Survey of the Dark Universe
ESA's Euclid mission was launched in July 2023 and has already sent home test images showing that its instruments are…
New Telescopes to Study the Aftermath of the Big Bang
The NSF just awarded researchers at UChicago to start developing the CMB-S4 experiment, which will map the earliest moments of…
Civilizations are Probably Spreading Quickly Through the Universe
New research shows how intelligent life might expand in an ever-expanding Universe, which has serious implications for SETI and the…
Euclid Recovers From a Navigation Problem and Finds its Guide Stars Again
After a bit of a hiccup with its navigation system, Euclid has found its navigation stars and is pointed the…
It's Going to Take More Than Early Dark Energy to Resolve the Hubble Tension
Astronomers have measured the Universe's expansion rate and found that various methods don't agree, and their error bars don't overlap.…
The Universe Could Be Twice As Old if Light is Tired and Physical Constants Change
A new paper argues that the universe is 26.7 billion years old. But the model only works by assuming tired…
The Early Universe Ran in Slow Motion
One of Einstein's predictions is that we should see time moving at different rates at different ages of the Universe.…
ESA's Euclid Mission is Off to Explore the Dark Universe
The Euclid space telescope, the ESA's next-generation astrophysics mission, was successfully launched to space!
Two New Space Telescopes Will Bring Dark Energy Into Focus
The ESA's Euclid and NASA's Nancy Grace Roman space telescope will work together to resolve the mystery of cosmic expansion!