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 ...

New research suggests that a troubling disparity in the rate of expansion of the universe, known as the Hubble constant, may arise from the fact Earth sits in a vast underdense region of the cosmos.

Over the course of human history, perhaps no single object in the night sky has drawn more attention than the Andromeda ...

If there is an absolute law in the universe, it’s that nothing can travel faster than the speed of light. Space is big, and ...

Our cosmos seems, at times, like one impossibly vast factory, just pumping out mysteries. The deeper we peer, the more we ...

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 ...

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 ...

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 ...

Physicists have been puzzling over conflicting observational results pertaining to the accelerating expansion rate of our Universe—a major discovery recognized by the 2011 Nobel Prize in Physics. New ...

New calculations have just been completed that show the rate of expansion for the universe. By zeroing in on the rate, the Hubble Constant, these calculations hammer another nail the casket of a ...

Measuring the expansion rate of the universe was one of the Hubble Space Telescope's main goals when it was launched in 1990. Measuring the expansion rate of the universe was one of the Hubble Space ...

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 ...