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Figure 4. Pseudo-color images of all Cepheid-bearing galaxies analyzed in this work.

Space

It’s official – we don’t know how fast the universe is expanding

The Hubble constant describes how fast the universe is expanding, but our measurements won’t line up, which may mean our standard model of the universe is wrong

News

Star trails over the Nicholas U. Mayall 4-meter Telescope on Kitt Peak National Observatory near Tucson, AZ.??

Space

Largest 3D map of the universe contains 8 million galaxies

News

3 of the most exciting space telescopes planned for launch by 2034

Space

3 of the most exciting space telescopes planned for launch by 2034

Features

How the James Webb telescope will rewrite the story of the universe

Space

How the James Webb telescope will rewrite the story of the universe

Features

This artistic impression shows two black holes that are spiralling towards each other and will eventually coalesce.

Space

Merging black holes may create bubbles that could swallow the universe

News

WHY is there something rather than nothing?

Physics

Why is there something not nothing? The big bang isn’t the only answer

Features

WHY is there a cosmic speed limit?

Physics

Why is there a cosmic speed limit? It could even be why we're here

Features

WHY is the universe just right? Spiral Galaxy in deep spcae, 3D illustration

Life

Why is the universe just right for life? Blame the multiverse

Features

WHY is the universe intelligible? X-ray: NASA/CXC/SAO/R. DiStefano, et al.; Optical: NASA/ESA/STScI/Grendler

Physics

Why is the universe intelligible? Things aren’t as clear as we think

Features

WHY do we exist?

Life

Why do we exist? The meaning of life isn’t to be found in the stars

We are tiny specks of life in a vast, indifferent cosmos – but to say that decreases the value of our existence is to measure ourselves against the wrong thing

Features

Space

Cosmic calculation may settle debate about the rate the universe grows

News

Space

We finally know when the first stars in the universe switched on

News

Space

Why the big bang may not have been the beginning of the universe

Comment

Physics

The hunt for a primordial force that would revolutionise cosmology

Features