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Astrophysics

Physics

We still don’t understand a basic fact about the universe

Field notes from space-time | Our measurements of the Hubble constant can't seem to come up with a consistent answer. What we learn next may alter our view of the cosmos, writes Chanda Prescod-Weinstein

News
Abstract big bang conceptual image

Physics

Big bang retold: The weird twists in the story of the universe’s birth

Features

Physics

Studying the universe鈥檚 origins hint that its beginning has no end

News
Above, an artist's impression shows a primordial quasar as it might have been, surrounded by sheets of gas, dust, stars and early star clusters. Exacting observations of three distant quasars now indicate emission of very specific colors of the element iron. These Hubble Space Telescope observations, which bolster recent results from the WMAP mission, indicate that a whole complete cycle of stars was born, created this iron, and died within the first few hundred million years of the universe.

Physics

Massive simulation of the universe shows how galaxies form and die

News

Physics

Born in the big bang: How ancient black holes could save cosmology

Features

Space

Dust is annoying, but it is also key to life and death in the cosmos

News

Physics

What if there was no big bang and we live in an ever-cycling universe?

Features

Physics

How the coolest, smallest stars could help us discover new exoplanets

News

Cosmic inflation
Claire Burke

Technology

Claire Burke on using thermal drone tech to protect orangutans

Astro-ecologist Claire Burke uses her astrophysics knowledge to protect endangered species and stop poaching, and she loves to watch orangutans in Borneo

Regulars

How did the universe begin?

Roger Penrose

Isaac Newton

Physics

We’ve seen signs of a mirror-image universe that is touching our own

Features