Cosmology
A New Way to Measure the Expansion Rate of the Universe: Redshift Drift
Almost all the galaxies in the Universe are speeding away from us because of the Big Bang and the acceleration…
JWST is the Perfect Machine to Resolve the Hubble Tension
Over the last decade, various measurements have disagreed over the rate that the Universe is expanding. Astronomers use Cepheid variables…
Euclid Reaches L2, Shares its First Test Image
ESA's Euclid mission has made the journey through space to reach the Earth-Sun L2 Lagrange Point. The two instruments on…
An Enormous Cosmological Simulation Wraps Up, Recreating Even More of the Universe
There's an old joke among astronomy students about a question on the final exam for a cosmology class. It goes…
Carbon-Based Molecules Seen Just a Billion Years After the Big Bang
The more astronomers look at the early Universe, the more discoveries they make. Some of those finds change what they…
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…
Soar Past Thousands of Galaxies in the Early Universe in Thrilling 3D
Want to visit the most distant galaxy in the early Universe? Now you can via a fantastic visualization created from…
JWST Sees the Most Distant Active Supermassive Black Hole
As astronomers push our views of the Universe further back in time, their telescopes keep uncovering surprises. That's the case…
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!