Cosmology

The Early Universe Had No Problem Making Barred Spiral Galaxies

Spiral galaxies like the Milky Way are like cosmic snowflakes—no two are exactly alike. For many years, astronomers thought spirals…

3 months ago

There Aren’t Many Galaxies Like The Milky Way Nearby. Now We Know Why

The Milky Way is a barred spiral galaxy, maybe even a grand design spiral galaxy. We can't be sure from…

3 months ago

If You Account for the Laniakea Supercluster, The Hubble Tension Might Be Even Larger

When you measure the Universe's expansion rate to relatively nearby galaxies against the expansion rate in the cosmic microwave background…

4 months ago

The Largest Simulation of the Universe Ever Made

It's about time to retire the old astronomy joke: "Define the Universe and give three examples." That's because recent simulations…

4 months ago

Everything in the Universe Fits in This One Graph. Even the Impossible Stuff

The Universe has physical constants, such as the force of gravity that define everything. If these constants were any different,…

4 months ago

More JWST Observations are Finding Fewer Early Massive Galaxies

Astronomers using JWST were surprised to find mature-looking galaxies in the early Universe; they challenged existing models of cosmology. Astronomers…

5 months ago

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…

5 months ago

Colliding Neutron Stars Could Help Measure the Expansion of the Universe

A new study presents a novel and independent method for measuring cosmic expansion using kilonova

5 months ago

The Big Bang: What is it? Why study it? What happened before? How will it all end?

Approximately 13.8 billion years ago, the greatest event in all of existence occurred that literally created existence itself. This event…

5 months ago

Seeing the Web Connecting Galaxies Across the Universe

One hundred years ago, we didn't know there was anything outside of our own galaxy, the Milky Way. Now we…

5 months ago