Cosmology

Gravitational lenses could be the key to measuring the expansion rate of the Universe

Nailing down cosmic expansion could depend on distant quasars, and the time it takes their light to reach us when…

1 day ago

Matter makes up exactly 31.5±1.3% of the Universe

Weighing the universe is a tricky task, but a team of astronomers have used a clever technique to measure how…

2 months ago

Gravitational-Wave Lensing is Possible, but it’s Going to be Incredibly Difficult to Detect

Because gravitational waves travel at the speed of light, they can be lensed just as light waves are. But observing…

2 months ago

Colliding Neutron Stars Don’t Make Enough Gold to Explain What We See in the Universe

Much of the gold we find on Earth was created by colliding neutron stars, but astronomers now know gold must…

2 months ago

New Simulation Shows Exactly What Dark Matter Would Look Like If We Could See It

A detailed simulation of dark matter finds that dark matter haloes form in a wide range of sizes.

3 months ago

The Last Supernovae

The last supernova in history will be the final burst of light in a cold, dark, and dead cosmos.

3 months ago

What Shuts Down a Galaxy’s Star Formation?

A new study finds that while black holes drive the formation of galaxies, they are also what kills them in…

4 months ago

A New Telescope is Ready to Start Searching for Answers to Explain Dark Energy

Back in 2015, construction began on a new telescope called the Dark Energy Spectroscopic Instrument (DESI). Later this year, it…

6 months ago

In the far future, the universe will be mostly invisible

If you look out on the sky on a nice clear dark night, you'll see thousands of intense points of…

7 months ago

What is the Steady State Hypothesis?

When it comes to cosmological theories, the Big Bang theory has historically had only one big contender - the Steady…

9 months ago