Over time, the Universe becomes less dominated by dark matter and more dominated by dark energy. Is one transforming into the other?
From black holes to dark energy to chances for life in the Universe, our cosmic journey to understand it all is just getting started.
Our model of the Universe, dominated by dark matter and dark energy, explains almost everything we see. Almost. Here's what remains.
There are two fundamentally different ways of measuring the Universe's expansion. They disagree. "Early dark energy" might save us.
13.8 billion years ago, the hot Big Bang gave rise to the Universe we know. Here's why the reverse, a Big Crunch, isn't how it will end.
From before the Big Bang to the present day, the Universe goes through many eras. Dark energy heralds the final one.
It could evolve, strengthen, decay, or not be alone. Our known Universe contains matter, radiation, and dark energy. While matter (both normal and dark) and radiation become less dense as […]
If dark energy gets stronger with time, our fate could be an utter catastrophe. When it comes to the entire Universe, one of the biggest existential questions we’re capable of […]
On the largest scales, galaxies don't simply clump together, but form superclusters. Too bad they don't remain bound together.
Einstein’s theory of general relativity passes another test, with implications for dark matter and dark energy
The theory is accurate within at least one part in a quadrillion.
With 1550 distinct type Ia supernovae measured across ~10 billion years of cosmic time, the Pantheon+ data set reveals our Universe.
If we were born trillions of years in the future, could we even figure out our cosmic history?
With 5,000 square degrees of data, the Dark Energy Survey has something important to say. For as long as humans have been studying the Universe, we’ve yearned to know the answers […]
Scientists put the most mysterious force in the Universe to the ultimate test. When it comes to the Universe, it’s easy to make the incorrect assumption that what we see is […]
Science is an ongoing flirtation with the unknown.
Has all this happened before, and will all this happen once again? There are only a few questions, when we ask them, that force us to reckon with the fundamental nature […]
We confidently state that the Universe is known to be 13.8 billion years old, with an uncertainty of just 1%. Here's how we know.
There are an estimated two trillion galaxies within the observable Universe. Most are already unreachable, and the situation only gets worse.
Dr. Katie Mack explains what dark energy is and two ways it could one day destroy the universe.
Our ultimate fate depends on something we’ve barely begun to measure. One of the biggest mysteries in all of physics is dark energy. According to our best observations, the Universe cannot […]
Or is ‘new space’ created in between the gaps of the ‘old’ space? It’s been almost 100 years since humanity first reached a revolutionary conclusion about our Universe: space itself doesn’t […]
Scientists with the the Dark Energy Spectroscopic Instrument (DESI) Legacy Imaging Surveys spent six years creating a detailed map of more than 1 billion galaxies.
As we look to larger cosmic scales, we get a broader view of the expansive cosmic forest, eventually revealing the grandest views of all.
The Universe is expanding, and the Hubble constant tells us how fast. But how can it be a constant if the expansion is accelerating?
No matter how beautiful, elegant, or compelling your idea is, if it disagrees with observation and experiment, it's wrong.
Are dark matter and dark energy both two sides of the same coin? When it comes to the Universe, what you can easily see isn’t always reflective of all there is. […]
It's been precisely 13.8 billion years since the Big Bang occurred. Here's how we know.