Cosmology

A Gravitational Wave Observatory on the Moon Could "Hear" 70% of the Observable Universe

A gravitational-wave telescope on the Moon could span the gap between Earth-based and space-based observations.

8 hours ago

Is the Universe a Fractal?

We find examples of fractals everywhere in nature. Tree branches, snowflakes, river deltas, cloud formations, and more. So it's natural…

1 week ago

White Dwarf Measured Before it Exploded as a Supernova

Using isotope measurements of a supernova remnant, astronomers have calculated the core density of a white dwarf before it exploded.

1 month ago

Is the Hubble constant not…Constant?

Cosmologists have been struggling to understand an apparent tension in their measurements of the present-day expansion rate of the universe,…

2 months ago

Dark Energy Survey is out. 29 Papers Covering 226 Million Galaxies Across 7 Billion Light-Years of Space

Cosmology is now stranger to large scale surveys.  The discipline prides itself on data collection, and when the data it…

2 months ago

It Could be Possible to see Gravitational Wave Lenses

Can waves of gravity be lensed by gravity? A recent study looks for lensed gravitational waves.

2 months ago

A new Method Simulates the Universe 1000 Times Faster

Cosmologists love universe simulations.  Even models covering hundreds of millions of light years can be useful for understanding fundamental aspects…

3 months ago

The Oldest Stars Help Tell us how big the Universe is

Astronomers are struggling to understand the discrepancies when measuring the expansion rate of the universe with different methods, and are…

5 months ago

New Supercomputer Simulations Will Help pin Down Inflation

In the very earliest moments of the big bang, the universe experienced a period of rapid expansion known as inflation.…

5 months ago

Simulations of the Universe are Getting Better and Better at Matching Reality

How can you possibly use simulations to reconstruct the history of the entire universe using only a small sample of…

5 months ago