All we can see makes up just 5% of the Universe. The rest of the vast darkness is not as empty as we once thought, but instead filled with dark matter and dark energy. How do we know they are there? Can we find evidence for them? And what has all this got to do with Einstein?
Graham’s been a familiar face on ABC television for many years, including being the host of the science program Catalyst. He has a PhD in astrophysics and has been a...View Profile
Professor Nicole Bell is a theoretical physicist at the University of Melbourne. Her research lies at the interface of particle physics, astrophysics and cosmology. She leads the Theory Program of...View Profile
Katherine Freese holds the Jeff and Gail Kodosky Endowed Chair in Physics at the University of Texas at Austin as well as Visiting Professor in Physics at Stockholm University. Previously,...View Profile
Lindsey Bignell is a particle physicist who builds experiments which hope to measure dark matter. These experiments are conducted in underground laboratories deep enough that the background of cosmic rays...View Profile
The powerful James Webb Space Telescope—the successor to the Hubble Space Telescope—promises insight into profound questions that have dogged philosophers and astronomers for millennia. Brian Greene brings together four scientists who will use the Webb to investigate these very questions.
For nearly a century, evidence has mounted that the gravitational pull necessary to keep clusters of galaxies intact, as well as stars within galaxies from flying apart, requires far more matter than we can see—matter, according to the experts, that has eluded our telescopes, because it does not give off light.
Forget what you think you know about dark matter. After a 30-year search for a single, as yet unidentified, species of dark matter particle that would make up some 25% of the mass of the universe, physicists are starting to consider novel explanations.
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