Hubble constant – Astronomy Now

“Tension” increases with different measurement of Hubble constant

24 October 2019 Astronomy Now

The first use of adaptive optics to measure the Hubble constant appears to confirm a discrepancy in cosmologists’ understanding of how fast the universe is expanding.

Hubble constant mismatch no fluke; new physics may be needed

27 April 2019 Astronomy Now

More precise observations of pulsating Cepheid variable stars confirms a major discrepancy in values of the Hubble constant.

Gravity waves may help resolve Hubble constant conundrum

16 February 2019 Astronomy Now

Over the next 10 years, researchers say, gravitational waves from merging neutron stars may resolve discrepancies in the value of the Hubble constant.

IAU recommends renaming Hubble’s law to include Lemaître

29 October 2018 Astronomy Now

The International Astronomical Union has voted to recommend renaming Hubble’s law to the Hubble-Lemaître law to honour the cosmological contributions of Belgian astronomer Georges Lemaitre.

Black hole-neutron star mergers could resolve Hubble constant conflict

16 July 2018 Astronomy Now

MIT researchers say gravitational waves from black hole-neutron star mergers may allow astronomers to more accurately measure how fast the Universe is expanding, resolving currently conflicting measurements of the Hubble constant.

Cosmic mystery deepens with conflicting measurements of Hubble constant

13 July 2018 Astronomy Now

The Hubble constant indicates how fast the Universe is expanding in the wake of the Big Bang. New observations using two independent techniques have come up with different values, signs of possible problems with current theory.

Hubble data indicate universe growing faster than expected

23 February 2018 William Harwood

Time-consuming observations by the Hubble Space Telescope indicate the universe is expanding faster today than predicted by standard models of the big bang that incorporate dark energy.

Cosmic lenses support finding on faster than expected expansion of the Universe

30 January 2017 Stephen Clark

By using galaxies as giant gravitational lenses, an international group of astronomers using the Hubble Space Telescope have made an independent measurement of how fast the Universe is expanding. The newly measured expansion rate for the local Universe is consistent with earlier findings. These are, however, in intriguing disagreement with measurements of the early Universe.

Hubble finds universe is expanding faster than expected

2 June 2016 Astronomy Now

When Edwin Hubble discovered nearly 100 years ago that the universe was uniformly expanding in all directions, the finding was a big surprise. Then, in the mid-1990s, another shocker occurred: astronomers found that the expansion rate was accelerating, perhaps due to “dark energy.” Now, the latest measurements of our runaway universe suggest that it is expanding faster than astronomers thought.