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.

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

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 ...

Day three brought two new measurements of the Hubble constant: A cosmic distance ladder calibrated with “Mira” stars gave 73.6, and galactic surface brightness fluctuations gave 76.5, both ...

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.

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 ...

This Hubble Telescope image shows a doubly-imaged quasar, which can be used to measure the Hubble constant. A new technique of measuring the Hubble Constant from such doubly-imaged quasar systems ...

If you measure the slope of that line, you get a value, colloquially known as the Hubble constant. But it isn't actually a constant at all, as it changes over time. Here's the science behind why.

Their calculations gave a Hubble constant of 69.8 —straddling the two previously determined numbers. “Our initial thought was that if there’s a problem to be resolved between the Cepheids and 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 ...