The universe's expansion is accelerating, a phenomenon attributed to dark energy, potentially explained by a cosmological constant (Λ) in Einstein's general relativity. The ΛCDM model, the standard ...

Whatever dark energy is, explanations for it have less wiggle room following a Hubble Space Telescope observation that has refined the measurement of the universe’s ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. The Coma Cluster, as seen by the Hubble Space Telescope. | Credit: NASA/ESA/Hubble Heritage Team ...

The question of how fast the universe is expanding continues to confound scientists. Although it might seem like a fairly straightforward issue, the reality is that it has been perplexing the best ...

Our cosmos seems, at times, like one impossibly vast factory, just pumping out mysteries. The deeper we peer, the more we learn – but each new discovery stirs up a plethora of new puzzles to solve, ...

Birthed from the minds of astronomers Edwin Hubble and Milton Humason, the Hubble constant has long been our closest attempt at understanding the universe's rate of expansion. However, recent attempts ...

Breakthroughs, discoveries, and DIY tips sent every weekday. Terms of Service and Privacy Policy. The universe is expanding—but astronomers can’t agree how fast ...

Combined Webb and Hubble Space Telescope data showing the galaxy NGC 5584, 72 million light-years away. Image: Image NASA, ESA, CSA, Adam G. Riess (JHU, STScI) Image Processing Alyssa Pagan (STScI) ...

A critically important number that specifies the expansion rate of the Universe, the so-called Hubble constant, has been independently determined using NASA’s Chandra X-ray Observatory. This new value ...

For almost a century, astronomers have been using the Hubble-Lemaitre constant to explain the accelerating expansion of the universe, an intrinsic piece of the puzzle that supports the Big Bang theory ...

Astronomers have proposed a new way to solve the so-called “Hubble tension,” but the approach ultimately raises more questions than it answers. By way of background, cosmologists are in a bit of a ...

To many cosmologists, the best thing about neutron-star mergers is that these events scream into space an otherwise close-kept secret of the universe. Scientists combined the gravitational and ...