Articles on Cosmology

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The universe is home to a dizzying number of stars and planets. But the vast bulk of the universe is thought to be invisible dark matter. Illustris Collaboration

Why do astronomers believe in dark matter?

Why do astronomers believe there's dark matter when it cannot be directly detected? Let's look at the evidence, and see what dark matter's presence means for our universe.
Captured: approximately 15,000 galaxies (12,000 of which are star-forming) widely distributed in time and space. NASA, ESA, P. Oesch (University of Geneva), and M. Montes (University of New South Wales)

Game-changing resolution: whose name on the laws of physics for an expanding universe?

Astronomers are voting to rename one of the laws of physics. The voting may have far-reaching effects leading to renaming of other laws and giving 'forgotten' scientists due credit.
Galaxy history revealed by the Hubble Space Telescope. NASA

What is nothing? Martin Rees Q&A

From a mysterious energy of empty space to parallel universes, cosmology's view of 'nothing' is anything but boring.
British theoretical physicist and cosmologist, Professor Stephen Hawking in 2014. EPA/Andy Rain

Tributes pour in for Stephen Hawking, the famous theoretical physicist who died at age 76

Stephen Hawking inspired people with his work on black holes and other mysteries of the universe. Many were quick to pay tribute to the theoretical physicist who died today in the UK, aged 76.
Stephen Hawking at Gonville & Caius College, Cambridge in 2015. lwpkommunikacio/flickr

A timeline of Stephen Hawking’s remarkable life

Hawking's most famous book, A Brief History of Time, sold 10 million copies and was translated into 40 languages, skyrocketing to the top of the bestseller lists in the US and UK.

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