Articles on Cosmology

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More than 70% of the Universe is made of ‘dark energy’, the mysterious stuff even stranger than dark matter

More than 70% of the Universe is made of ‘dark energy’, the mysterious stuff even stranger than dark matter. The Conversation17.1 MB (download)
Today on the podcast, we explore what we know about dark energy, believed to be responsible for the acceleration of the expansion of the Universe.
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.

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