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Astrophysics

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Why Did The Universe Begin?

July 24, 2025

In this episode of The Joy of Why, Thomas Hertog discusses his collaboration with Stephen Hawking on a provocative theory arguing that the laws of physics evolved with the universe, and how this could have shaped a cosmos fit for life.

The Biggest-Ever Digital Camera Is This Cosmologist’s Magnum Opus

July 11, 2025

Tony Tyson’s cameras revealed the universe’s dark contents. Now, with the Rubin Observatory’s 3.2-billion-pixel camera, he’s ready to study dark matter and dark energy in unprecedented detail.

Physicists Start To Pin Down How Stars Forge Heavy Atoms

July 2, 2025

The precursors of heavy elements might arise in the plasma underbellies of swollen stars or in smoldering stellar corpses. They definitely exist in East Lansing, Michigan.

Will We Ever Prove String Theory?

May 29, 2025

Promise and controversy continues to surround string theory as a potential unified theory of everything. In the latest episode of The Joy of Why, Cumrun Vafa discusses his progress in trying to find good, testable models hidden among the ‘swampland’ of impossible universes.

Is Dark Energy Getting Weaker? New Evidence Strengthens the Case.

March 19, 2025

Last year, an enormous map of the cosmos hinted that the engine driving cosmic expansion might be sputtering. Now physicists are back with an even bigger map, and a stronger conclusion.

The Road Map to Alien Life Passes Through the ‘Cosmic Shoreline’

March 12, 2025

Astronomers are ready to search for the fingerprints of life in faraway planetary atmospheres. But first, they need to know where to look — and that means figuring out which planets are likely to have atmospheres in the first place.

Cosmologists Try a New Way to Measure the Shape of the Universe

January 27, 2025

Is the universe flat and infinite, or something more complex? We can’t say for sure, but a new search strategy is mapping out the subtle signals that could reveal if the universe has a shape.

The Year in Physics

December 17, 2024

Physicists discovered strange supersolids, constructed new kinds of superconductors, and continued to make the case that the cosmos is far weirder than anyone suspected.

The Cosmos Teems with Complex Organic Molecules

November 13, 2024

Wherever astronomers look, they see life’s raw materials.

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