Dark matter makes up most of the mass in galaxies and galaxy clusters. In fact, scientists estimate that ordinary matter makes up only about 5% of the universe, while dark matter makes up about 27%.
A novel theory suggests that the current expansion rate of the universe is not fixed, but was in fact quite different in the ...
Add Yahoo as a preferred source to see more of our stories on Google. A new study challenges the idea of an ever-expanding universe. (CREDIT: CC BY-SA 4.0) Astrophysicists have presumed for nearly a ...
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Data from dark-energy observatories indicate universe may 'end in a big crunch' at 33 billion years old
The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from dark-energy observatories. After expanding to its peak size about 11 billion ...
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How fast is the universe expanding? Astronomers may be one step closer to resolving 'Hubble trouble'
The local universe may be expanding more slowly than previously thought, a discovery that could relieve a pesky discrepancy ...
Scientists studying a mysterious effect called cosmic birefringence—a subtle twist in the polarization of the universe’s oldest light—have developed a new way to reduce uncertainty in how it’s ...
The universe expands faster. “Dark energy” may not be constant after all. We’ve known since 1929 that the universe is expanding, and since 1998 that it’s speeding up. The unknown force behind this ...
Dark energy is still one of the greatest cosmic mysteries. For all the time, money and telescopes that humanity has used to uncover its nature, scientists are still asking a fundamental question: What ...
One of the most stubborn issues in cosmology today concerns the universe's rate of expansion. Scientists know it's expanding, but defining the rate of that expansion is challenging. The rate of ...
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