For the first time, astronomers have captured stunning visual evidence of a star double-detonating itself to death.The twin ...

Depending on the value of the Hubble constant, this gives an age of about 14 billion years—not far off the current best-estimate of 13.8 billion years. However, there’s a slight complication. The ...

Planck found the Hubble constant to be 46,200 mph per million light-years (67.4 km/s/Mpc) in 2018. A Hubble Space Telescope image shows RS Puppis, one of the brightest Cepheids visible in our galaxy.

Is the Hubble constant—a key part of how we measure the expansion of our universe—in a crisis? Some cosmologists say yes.

The Hubble Constant is the unit of measurement used to describe the expansion of the universe. The cosmos has been getting bigger since the Big Bang kick-started the growth about 13.82 billion ...

By the late 1930s, astronomers were coming to refer to the slope of Hubble’s graph — the rate at which this recession increases with distance — as Hubble’s constant, and later simply the ...

For years, scientists have worked to chart the universe’s massive structure, aiming to test key models of cosmology. These ...

The Hubble constant was higher in the distant past, when much of the light was emitted, but it's taken billions of years for that light to arrive at our eyes.

In just over 10 hours of test observations, the Vera C. Rubin Observatory captured millions of celestial objects, opening the ...

Together with the standard model of cosmology, the images show that the universe is expanding with a Hubble constant that’s lower than the JWST measurement by about 5.6 kilometers per second per ...

New evidence deepens a mystery around the Hubble constant, one of the most important numbers in cosmology. Nearly 200,000 light-years from Earth, the Large Magellanic Cloud—a satellite galaxy of ...

The issue has come to be known as the "Hubble tension."It arises from the fact that there are two ways to calculate the Hubble constant at the universe's current age, but these methods do not ...