#GravitationalWaves are ripples in #spacetime that propagate at the speed of light. As a gravitational wave spreads out, it stretches and contracts space at an insanely fast rate.

Over next decades, more gravitational wave detections will allow #astronomers to look deeper in the past, and help them get closer to determining the true value of the #HubbleConstant.

I write for Asian Scientist Magazine https://www.asianscientist.com/2023/07/in-the-lab/gravitational-waves-reveal-universes-expansion/

Leveraging SN Ia spectroscopic similarity to improve the measurement of H0: https://arxiv.org/abs/2306.00070 -> and the #HubbleConstant comes out as ... drum roll ... 73.3 +/- 0.9 km/s/Mpc. With which "the discrepancy against ΛCDM calibrated by the Planck 2018 measurement rises to 5.7σ."

Leveraging SN Ia spectroscopic similarity to improve the measurement of H0: https://arxiv.org/abs/2306.00070 -> and the #HubbleConstant comes out as ... drum roll ... 73.3 +/- 0.9 km/s/Mpc.

#SaulPerlmutter - How Big can the #Cosmos Get?

https://www.youtube.com/watch?v=REtP2-Av39E&ab_channel=CloserToTruth

#PhilosophyOfScience #Physics #Astrophysics #Cosmology #PhilosophyOfCosmology #Multiverse #MultipleUniverses #Universe #Hubble #HubbleConstant #Expansion #ExpandingUniverse #CloserToTruth #RobertKuhn

Scientists have used a new method to measure the universe's expansion rate and found a discrepancy with the standard model of cosmology. This suggests something is missing or wrong in our understanding of the universe's physics. The new method, called the cosmic distance ladder, relies on precise measurements of stars and galaxies, and could help us solve the mystery of dark energy.

#Cosmology #DarkEnergy #HubbleConstant

https://www.sciencealert.com/new-cosmic-ladder-measurement-leaves-us-with-a-major-physics-problem

The Hubble Constant from Standardized TRGB and Type Ia Supernova Measurements (Comparative Analysis of TRGBs or CATs): https://arxiv.org/abs/2304.06693 -> https://twitter.com/DScol/status/1646698788168388609 (detailled discussion in a long thread) - the #HubbleConstant comes out as ~73 and the famous 'tension' with Planck is as strong as ever.

Is Something Missing from the #Standard #Model of the #Universe? - A 2018 #HubbleSpaceTelescope finding confirmed a nagging #discrepancy about the #HubbleConstant showing the universe is expanding faster now than was shortly after the #bigbang. #Researchers hinted that there may be #newphysics to explain the inconsistency known as the ‘#HubbleTension’.

https://dailygalaxy.com/2022/11/the-standard-model-that-describes-the-fundamental-nature-of-the-universe-needs-to-be-revised/

On how old is our universe, and what's its size, the Hubble Constant and a Cosmic dilemma, and how the Universe’s dark-matter dominated structures have formed over the eons of time -- check out the University of Hawai'i News on the publication of the Cosmicflows-4 Catalog: https://hawaii.edu/news/2022/09/26/map-galaxies-largest-ever-catalog

research paper: https://arxiv.org/abs/2209.11238

#universe #cosmology #galaxies #darkmatter #hubble #hubbleconstant #expansion #bigbang #bigbangtheory #astronomy #astrophysics #physics #space #science #cosmos

In honor of Edwin Hubble's birthday, a new science video on the Hubble Constant, from #HST: https://fb.watch/gWaEuEH0ri/ (click on link to view video) #Hubble #SpaceTelescope #HubbleConstant #HubbleSpaceTelescope #ExpandingUniverse #HubbleScience

#TachyonBeam #astronomy #HubbleConstant #SuperhorizonModes An article published in "The Astrophysical Journal Letters" offers a solution to two of the major problems currently existing in the field of #cosmology.

https://english.tachyonbeam.com/2022/02/04/a-new-model-offers-a-solution-to-two-of-todays-major-cosmological-problems/

#astronomy #cosmology #HubbleConstant An article published in "The Astrophysical Journal" reports a calculation of the expansion velocity of the universe based on type Ia #supernovae.
https://english.tachyonbeam.com/2021/05/18/calculating-the-expansion-velocity-of-the-universe-based-on-type-ia-supernovae-gives-variable-results-depending-on-their-distance/

#astronomy #cosmology #HubbleConstant An article published in the journal "Astronomy & Astrophysics" reports a method to measure the expansion velocity of the universe that takes into account the differences between the type Ia supernovae used.
https://english.tachyonbeam.com/2021/03/14/a-new-calibration-in-the-measurement-of-the-universes-expansion-offers-hope-of-finding-an-accurate-value/

#astronomy #cosmology #HubbleConstant An article published in the journal "Physical Review Letters" reports a new estimate of the expansion of the universe based on the large cosmic structures formed by galaxies.
https://english.tachyonbeam.com/2020/06/05/galaxies-and-cosmic-voids-used-to-measure-the-hubble-constant

#astronomy #cosmology #HubbleConstant An article being published in "The Astrophysical Journal" reports a new attempt to calculate the speed of the universe expansion, this time using red giant stars as a reference. https://english.tachyonbeam.com/2019/07/18/using-red-giants-to-estimate-the-speed-of-the-universe-expansion

#astronomy #cosmology #HubbleConstant An article published in "The Astrophysical Journal" reports a new measurement of the expansion of the universe, which is approximately 9% faster than the estimates made by studying the early universe. https://english.tachyonbeam.com/2019/04/26/the-extent-of-the-expansion-of-the-universe-is-increasingly-precise-and-stresses-the-discrepancy-between-the-measurements

The answer to life, the universe and everything might be 73. Or 67 | #Science | The Guardian

https://www.theguardian.com/science/2018/may/10/the-answer-to-life-the-universe-and-everything-might-be-73-or-67

#HubbleConstant #Physics #Astronomy #Astophysics #Cosmology